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<button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">cuddio</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Llywio </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage" class="mw-list-item"><a href="/wiki/Hafan" title="Ymweld â'r Hafan [z]" accesskey="z"><span>Hafan</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wicipedia:Porth_y_Gymuned" title="Pethau i'w gwneud, adnoddau a thudalennau'r gymuned"><span>Porth y Gymuned</span></a></li><li id="n-cafe" class="mw-list-item"><a href="/wiki/Wicipedia:Y_Caffi"><span>Y Caffi</span></a></li><li id="n-currentevents" class="mw-list-item"><a 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id="mw-panel" class="vector-main-menu-landmark" aria-label="Safle"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Cynnwys" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Cynnwys</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">cuddio</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Y dechrau</div> </a> </li> <li id="toc-Rhai_mathau" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Rhai_mathau"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Rhai mathau</span> </div> </a> <button aria-controls="toc-Rhai_mathau-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toglo is-adran Rhai mathau</span> </button> <ul id="toc-Rhai_mathau-sublist" class="vector-toc-list"> <li id="toc-Siartiau_mwyaf_cyffredin" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Siartiau_mwyaf_cyffredin"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Siartiau mwyaf cyffredin</span> </div> </a> <ul id="toc-Siartiau_mwyaf_cyffredin-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Plotio" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Plotio"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Plotio</span> </div> </a> <ul id="toc-Plotio-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Cyfeiriadau" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cyfeiriadau"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Cyfeiriadau</span> </div> </a> <ul id="toc-Cyfeiriadau-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Cynnwys" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Tabl Cynnwys" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toglo'r tabl cynnwys" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toglo'r tabl cynnwys</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Siart</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ewch i erthygl mewn iaith arall. Ar gael mewn 30 iaith" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-30" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">30 iaith</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%85%D8%AE%D8%B7%D8%B7_%D8%A8%D9%8A%D8%A7%D9%86%D9%8A" title="مخطط بياني - Arabeg" lang="ar" hreflang="ar" data-title="مخطط بياني" data-language-autonym="العربية" data-language-local-name="Arabeg" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bew mw-list-item"><a href="https://bew.wikipedia.org/wiki/Gambar_l%C3%A8r-l%C3%A8ran" title="Gambar lèr-lèran - Betawi" lang="bew" hreflang="bew" data-title="Gambar lèr-lèran" data-language-autonym="Betawi" data-language-local-name="Betawi" class="interlanguage-link-target"><span>Betawi</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Gr%C3%A0fica" title="Gràfica - Catalaneg" lang="ca" hreflang="ca" data-title="Gràfica" data-language-autonym="Català" data-language-local-name="Catalaneg" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Graf" title="Graf - Daneg" lang="da" hreflang="da" data-title="Graf" data-language-autonym="Dansk" data-language-local-name="Daneg" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Chart" title="Chart - Saesneg" lang="en" hreflang="en" data-title="Chart" data-language-autonym="English" data-language-local-name="Saesneg" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Gr%C3%A1fica" title="Gráfica - Sbaeneg" lang="es" hreflang="es" data-title="Gráfica" data-language-autonym="Español" data-language-local-name="Sbaeneg" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Datu-diagrama" title="Datu-diagrama - Basgeg" lang="eu" hreflang="eu" data-title="Datu-diagrama" data-language-autonym="Euskara" data-language-local-name="Basgeg" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Gr%C3%A1fica" title="Gráfica - Galisieg" lang="gl" hreflang="gl" data-title="Gráfica" data-language-autonym="Galego" data-language-local-name="Galisieg" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gn mw-list-item"><a href="https://gn.wikipedia.org/wiki/Ta%27angahai" title="Ta'angahai - Guaraní" lang="gn" hreflang="gn" data-title="Ta'angahai" data-language-autonym="Avañe'ẽ" data-language-local-name="Guaraní" class="interlanguage-link-target"><span>Avañe'ẽ</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%92%D7%A8%D7%A3_(%D7%AA%D7%A8%D7%A9%D7%99%D7%9D)" title="גרף (תרשים) - Hebraeg" lang="he" hreflang="he" data-title="גרף (תרשים)" data-language-autonym="עברית" data-language-local-name="Hebraeg" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B2%E0%A5%87%E0%A4%96%E0%A4%BE%E0%A4%9A%E0%A4%BF%E0%A4%A4%E0%A5%8D%E0%A4%B0" title="लेखाचित्र - Hindi" lang="hi" hreflang="hi" data-title="लेखाचित्र" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Bagan" title="Bagan - Indoneseg" lang="id" hreflang="id" data-title="Bagan" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indoneseg" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Grafikajo_(datum-analizo)" title="Grafikajo (datum-analizo) - Ido" lang="io" hreflang="io" data-title="Grafikajo (datum-analizo)" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%B5%B1%E8%A8%88%E5%9B%B3%E8%A1%A8" title="統計図表 - Japaneeg" lang="ja" hreflang="ja" data-title="統計図表" data-language-autonym="日本語" data-language-local-name="Japaneeg" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A7%D0%B0%D1%80%D1%82" title="Чарт - Casacheg" lang="kk" hreflang="kk" data-title="Чарт" data-language-autonym="Қазақша" data-language-local-name="Casacheg" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%B0%A8%ED%8A%B8" title="차트 - Coreeg" lang="ko" hreflang="ko" data-title="차트" data-language-autonym="한국어" data-language-local-name="Coreeg" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Carta" title="Carta - Maleieg" lang="ms" hreflang="ms" data-title="Carta" data-language-autonym="Bahasa Melayu" data-language-local-name="Maleieg" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-om mw-list-item"><a href="https://om.wikipedia.org/wiki/Taattoo" title="Taattoo - Oromo" lang="om" hreflang="om" data-title="Taattoo" data-language-autonym="Oromoo" data-language-local-name="Oromo" class="interlanguage-link-target"><span>Oromoo</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Wykres" title="Wykres - Pwyleg" lang="pl" hreflang="pl" data-title="Wykres" data-language-autonym="Polski" data-language-local-name="Pwyleg" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Gr%C3%A1fico_(estat%C3%ADstica)" title="Gráfico (estatística) - Portiwgaleg" lang="pt" hreflang="pt" data-title="Gráfico (estatística)" data-language-autonym="Português" data-language-local-name="Portiwgaleg" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Chart" title="Chart - Simple English" lang="en-simple" hreflang="en-simple" data-title="Chart" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Grafikon" title="Grafikon - Slofeneg" lang="sl" hreflang="sl" data-title="Grafikon" data-language-autonym="Slovenščina" data-language-local-name="Slofeneg" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Grafiku" title="Grafiku - Albaneg" lang="sq" hreflang="sq" data-title="Grafiku" data-language-autonym="Shqip" data-language-local-name="Albaneg" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Chati" title="Chati - Swahili" lang="sw" hreflang="sw" data-title="Chati" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%B5%E0%AE%BF%E0%AE%B3%E0%AE%95%E0%AF%8D%E0%AE%95%E0%AE%AA%E0%AF%8D%E0%AE%AA%E0%AE%9F%E0%AE%AE%E0%AF%8D" title="விளக்கப்படம் - Tamileg" lang="ta" hreflang="ta" data-title="விளக்கப்படம்" data-language-autonym="தமிழ்" data-language-local-name="Tamileg" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Tsart" title="Tsart - Tagalog" lang="tl" hreflang="tl" data-title="Tsart" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%94%D1%96%D0%B0%D0%B3%D1%80%D0%B0%D0%BC%D0%B0_(%D0%BF%D1%80%D0%B5%D0%B4%D1%81%D1%82%D0%B0%D0%B2%D0%BB%D0%B5%D0%BD%D0%BD%D1%8F_%D0%B4%D0%B0%D0%BD%D0%B8%D1%85)" title="Діаграма (представлення даних) - Wcreineg" lang="uk" hreflang="uk" data-title="Діаграма (представлення даних)" data-language-autonym="Українська" data-language-local-name="Wcreineg" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%B5%B1%E8%A8%88%E5%9C%96%E8%A1%A8" title="統計圖表 - Tsieinëeg" lang="zh" hreflang="zh" data-title="統計圖表" data-language-autonym="中文" data-language-local-name="Tsieinëeg" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Chart" title="Chart - Minnan" lang="nan" hreflang="nan" data-title="Chart" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E7%B5%B1%E8%A8%88%E5%9C%96" title="統計圖 - Cantoneeg" lang="yue" hreflang="yue" data-title="統計圖" data-language-autonym="粵語" data-language-local-name="Cantoneeg" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q28923#sitelinks-wikipedia" title="Golygu dolenni rhyngwici" class="wbc-editpage">Golygu dolenni</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Parthau"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Siart" title="Gweld y dudalen bwnc [c]" accesskey="c"><span>Erthygl</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Sgwrs:Siart&action=edit&redlink=1" rel="discussion" class="new" title="Sgwrsio am y dudalen (nid yw'r dudalen yn bodoli) [t]" accesskey="t"><span>Sgwrs</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Newid amrywiad iaith" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Cymraeg</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Golygon"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Siart"><span>Darllen</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Siart&veaction=edit" title="Golygu'r dudalen hon [v]" accesskey="v"><span>Golygu</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Siart&action=edit" title="Golygu cod ffynhonnell y dudalen hon [e]" accesskey="e"><span>Golygu cod</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Siart&action=history" title="Fersiynau cynt o'r dudalen hon. [h]" accesskey="h"><span>Gweld hanes</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Offer tudalen"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Blwch offer" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Blwch offer</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Blwch offer</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">cuddio</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Rhagor o opsiynau" > <div class="vector-menu-heading"> Gweithredoedd </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Siart"><span>Darllen</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Siart&veaction=edit" title="Golygu'r dudalen hon [v]" accesskey="v"><span>Golygu</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Siart&action=edit" title="Golygu cod ffynhonnell y dudalen hon [e]" accesskey="e"><span>Golygu cod</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Siart&action=history"><span>Gweld hanes</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Cyffredinol </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Arbennig:WhatLinksHere/Siart" title="Rhestr o bob tudalen sy'n cysylltu â hon [j]" accesskey="j"><span>Beth sy'n cysylltu yma</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Arbennig:RecentChangesLinked/Siart" rel="nofollow" title="Newidiadau diweddar i dudalennau sydd yn cysylltu â hon [k]" accesskey="k"><span>Newidiadau perthnasol</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Siart&oldid=6091271" title="Dolen barhaol i'r fersiwn hwn y dudalen hon"><span>Dolen barhaol</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Siart&action=info" title="Mwy o wybodaeth am y dudalen hon"><span>Gwybodaeth am y dudalen</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Arbennig:CiteThisPage&page=Siart&id=6091271&wpFormIdentifier=titleform" title="Gwybodaeth ar sut i gyfeirio at y dudalen hon"><span>Cyfeirio at y dudalen hon</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Arbennig:UrlShortener&url=https%3A%2F%2Fcy.wikipedia.org%2Fwiki%2FSiart"><span>Cael URL byr</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Arbennig:QrCode&url=https%3A%2F%2Fcy.wikipedia.org%2Fwiki%2FSiart"><span>Lawrlwytho cod QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Argraffu / allforio </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Arbennig:Book&bookcmd=book_creator&referer=Siart"><span>Llunio llyfr</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Arbennig:DownloadAsPdf&page=Siart&action=show-download-screen"><span>Lawrlwytho fel PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Siart&printable=yes" title="Cynhyrchwch fersiwn o'r dudalen yn barod at ei hargraffu [p]" accesskey="p"><span>Fersiwn argraffu</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Mewn prosiectau eraill </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Chart" hreflang="en"><span>Comin Wikimedia</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q28923" title="Cysylltu i eitem ystorfa gysylltiedig [g]" accesskey="g"><span>Eitem Wicidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Offer tudalen"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Gwedd"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Gwedd</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">cuddio</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Oddi ar Wicipedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="cy" dir="ltr"><figure typeof="mw:File/Thumb"><a href="/wiki/Delwedd:WorldWarI-MilitaryDeaths-EntentePowers-Piechart_cy.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/WorldWarI-MilitaryDeaths-EntentePowers-Piechart_cy.svg/300px-WorldWarI-MilitaryDeaths-EntentePowers-Piechart_cy.svg.png" decoding="async" width="300" height="263" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/WorldWarI-MilitaryDeaths-EntentePowers-Piechart_cy.svg/450px-WorldWarI-MilitaryDeaths-EntentePowers-Piechart_cy.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ec/WorldWarI-MilitaryDeaths-EntentePowers-Piechart_cy.svg/600px-WorldWarI-MilitaryDeaths-EntentePowers-Piechart_cy.svg.png 2x" data-file-width="480" data-file-height="420" /></a><figcaption>Siart cylch sy'n dangos marwolaethau milwrol y <a href="/wiki/Rhyfel_Byd_1af" class="mw-redirect" title="Rhyfel Byd 1af">Rhyfel Byd 1af</a> - o ran y Cynghreiriaid, yn ôl gwlad.</figcaption></figure> <dl><dd><i>Erthygl ar y dull 2-D a 3-D o gyflwyno data yn weledol yw hwn, am y parau o wrthrychau sy'n cynrychioli fertigau, gweler: <a href="/wiki/Graff_(mathemateg_arwahanol)" title="Graff (mathemateg arwahanol)">Graff (mathemateg arwahanol)</a>.</i></dd></dl> <p><a href="/wiki/Data" title="Data">Data</a> wedi'i gynrychioli mewn modd graffigol a gweledol yw <b>siart</b>, neu 'siart data'. Cynrychiolir y data gan symbolau megis bariau mewn <a href="/wiki/Siart_bar" title="Siart bar">siart bar</a>, llnellau mewn <a href="/wiki/Siart_llinell" title="Siart llinell">siart llinell</a> neu sleisen mewn <a href="/wiki/Siart_cylch" title="Siart cylch">siart cylch</a>. Gall arddangos data rhifol ar ffurf <a href="/w/index.php?title=Tabl&action=edit&redlink=1" class="new" title="Tabl (nid yw'r dudalen yn bodoli)">tabl</a> neu <a href="/wiki/Ffwythiant" title="Ffwythiant">ffwythiannau</a> ac unrhyw strwythurau o symiau gan ei gyflwyno i'r darllenydd mewn modd gymharol syml.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>Mae gan y term "siart", fel cynrychiolaeth graffigol o <a href="/wiki/Data" title="Data">ddata</a>, sawl ystyr: </p> <ul><li>Math o <a href="/w/index.php?title=Diagram&action=edit&redlink=1" class="new" title="Diagram (nid yw'r dudalen yn bodoli)">ddiagram</a> neu <a href="/w/index.php?title=Graff_ffwythiant&action=edit&redlink=1" class="new" title="Graff ffwythiant (nid yw'r dudalen yn bodoli)">graff</a> yw siart data, sy'n trefnu ac yn cynrychioli set o ddata rhifiadol neu ansoddol (<i>qualitative</i>).</li> <li>Gelwir <a href="/wiki/Map" title="Map">mapiau</a> gyda gwybodaeth ychwanegol (yn yr ymylon) yn aml yn siartiau, e.e. siartiau môr neu siartiau i fapio lleoliad awyrennau, a gall y siartiau hyn gael eu harddangos dros nifer o ran-fapiau.</li> <li>Weithiau, gelwir ffurfiau eraill ar gyfer parth yn siartiau, megis 'siart cordiau' mewn nodiant cerddoriaeth neu <a href="/wiki/Siart_record" class="mw-redirect" title="Siart record">siart record</a> ar gyfer poblogrwydd <a href="/wiki/Albwm" title="Albwm">albwm</a>.</li></ul> <p>Defnyddir siartiau'n aml i'w gwneud hi'n haws deall swm anferthol o ddata, a'r berthynas rhwng rhannau o'r data. Fel arfer, gall siartiau gael eu darllen yn gyflymach na'r data crai. Fe'u defnyddir mewn amrywiaeth eang o feysydd, a gellir eu creu â llaw (yn aml ar bapur graff) neu drwy gyfrifiadur gan ddefnyddio <a href="/wiki/Meddalwedd" title="Meddalwedd">meddalwedd</a> siartio. Mae rhai mathau o siartiau yn fwy defnyddiol ar gyfer cyflwyno set ddata benodol nag eraill. Er enghraifft, mae data sy'n cyflwyno canrannau mewn gwahanol grwpiau (fel atebion i <a href="/w/index.php?title=Holiadur&action=edit&redlink=1" class="new" title="Holiadur (nid yw'r dudalen yn bodoli)">holiadur</a>: "bodlon", "anfodlon", "ansicr" ayb) yn cael eu harddangos yn aml mewn <a href="/wiki/Siart_cylch" title="Siart cylch">siart cylch</a>, ond mae'n bosibl eu bod yn haws eu deall pan fyddant yn cael eu cyflwyno mewn siart bar llorweddol. Ar y llaw arall, mae'n bosibl y bydd y data sy'n cynrychioli niferoedd sy'n newid dros gyfnod o amser (fel "Incwm Blynyddol o 2018 i 2019") yn cael ei ddangos orau fel <a href="/wiki/Siart_llinell" title="Siart llinell">siart llinell</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Rhai_mathau">Rhai mathau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Siart&veaction=edit&section=1" title="Golygu'r adran: Rhai mathau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Siart&action=edit&section=1" title="Edit section's source code: Rhai mathau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Siartiau_mwyaf_cyffredin">Siartiau mwyaf cyffredin</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Siart&veaction=edit&section=2" title="Golygu'r adran: Siartiau mwyaf cyffredin" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Siart&action=edit&section=2" title="Edit section's source code: Siartiau mwyaf cyffredin"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul class="gallery mw-gallery-traditional"> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/Delwedd:Phanerozoic_Biodiversity-CY.svg" class="mw-file-description" title="Histogram, gyda llinell yn dangos y tuedd"><img alt="Histogram, gyda llinell yn dangos y tuedd" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/61/Phanerozoic_Biodiversity-CY.svg/120px-Phanerozoic_Biodiversity-CY.svg.png" decoding="async" width="120" height="71" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/61/Phanerozoic_Biodiversity-CY.svg/180px-Phanerozoic_Biodiversity-CY.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/61/Phanerozoic_Biodiversity-CY.svg/240px-Phanerozoic_Biodiversity-CY.svg.png 2x" data-file-width="784" data-file-height="464" /></a></span></div> <div class="gallerytext"><a href="/wiki/Histogram" class="mw-redirect" title="Histogram">Histogram</a>, gyda llinell yn dangos y tuedd</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/Delwedd:IUCN_Red_List_2007_cy.svg" class="mw-file-description" title="Siart bar o brinder rhywogaethau"><img alt="Siart bar o brinder rhywogaethau" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/IUCN_Red_List_2007_cy.svg/120px-IUCN_Red_List_2007_cy.svg.png" decoding="async" width="120" height="59" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/IUCN_Red_List_2007_cy.svg/180px-IUCN_Red_List_2007_cy.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/IUCN_Red_List_2007_cy.svg/240px-IUCN_Red_List_2007_cy.svg.png 2x" data-file-width="800" data-file-height="394" /></a></span></div> <div class="gallerytext"><a href="/wiki/Siart_bar" title="Siart bar">Siart bar</a> o brinder rhywogaethau</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/Delwedd:Web-browser_usage_on_Wikimedia_cy.svg" class="mw-file-description" title="Siart cylch yn dangos canrannau porwyr gwe"><img alt="Siart cylch yn dangos canrannau porwyr gwe" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Web-browser_usage_on_Wikimedia_cy.svg/120px-Web-browser_usage_on_Wikimedia_cy.svg.png" decoding="async" width="120" height="107" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Web-browser_usage_on_Wikimedia_cy.svg/180px-Web-browser_usage_on_Wikimedia_cy.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Web-browser_usage_on_Wikimedia_cy.svg/240px-Web-browser_usage_on_Wikimedia_cy.svg.png 2x" data-file-width="429" data-file-height="381" /></a></span></div> <div class="gallerytext"><a href="/wiki/Siart_cylch" title="Siart cylch">Siart cylch</a> yn dangos canrannau porwyr gwe</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/Delwedd:2ms.jpg" class="mw-file-description" title="Siart llinell"><img alt="Siart llinell" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/2ms.jpg/120px-2ms.jpg" decoding="async" width="120" height="68" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/2ms.jpg/180px-2ms.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2b/2ms.jpg/240px-2ms.jpg 2x" data-file-width="334" data-file-height="190" /></a></span></div> <div class="gallerytext"><a href="/wiki/Siart_llinell" title="Siart llinell">Siart llinell</a></div> </li> </ul> <ol><li>Histogram: math o siart bar sy'n ddull o ddangos dosbarthiad amlder</li> <li>Siart bar: dull o ddangos amlder dosbarthiad. Ceir nifer yr achosion ar yr echelin fertigol.</li> <li>Siart cylch: fe'i defnyddir yn aml i ddangos hyn-a-hyn y cant (canrannau)</li> <li>Siart llinell: sy'n dangos data cysylltiedig, di-dor.</li></ol> <div class="mw-heading mw-heading3"><h3 id="Plotio">Plotio</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Siart&veaction=edit&section=3" title="Golygu'r adran: Plotio" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Siart&action=edit&section=3" title="Edit section's source code: Plotio"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul class="gallery mw-gallery-traditional"> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/Delwedd:Michelsonmorley-boxplot.svg" class="mw-file-description" title="Plotio blychau"><img alt="Plotio blychau" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Michelsonmorley-boxplot.svg/120px-Michelsonmorley-boxplot.svg.png" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Michelsonmorley-boxplot.svg/180px-Michelsonmorley-boxplot.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Michelsonmorley-boxplot.svg/240px-Michelsonmorley-boxplot.svg.png 2x" data-file-width="432" data-file-height="432" /></a></span></div> <div class="gallerytext">Plotio blychau</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/Delwedd:ICC-example1.svg" class="mw-file-description" title="Plotio dotiau (ystadegau)"><img alt="Plotio dotiau (ystadegau)" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/ICC-example1.svg/120px-ICC-example1.svg.png" decoding="async" width="120" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/ICC-example1.svg/180px-ICC-example1.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c9/ICC-example1.svg/240px-ICC-example1.svg.png 2x" data-file-width="720" data-file-height="540" /></a></span></div> <div class="gallerytext">Plotio dotiau (<a href="/wiki/Ystadegau" class="mw-redirect" title="Ystadegau">ystadegau</a>)</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/Delwedd:Probability_Plot.gif" class="mw-file-description" title="Plotio tebygolrwydd"><img alt="Plotio tebygolrwydd" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Probability_Plot.gif/120px-Probability_Plot.gif" decoding="async" width="120" height="88" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Probability_Plot.gif/180px-Probability_Plot.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Probability_Plot.gif/240px-Probability_Plot.gif 2x" data-file-width="380" data-file-height="280" /></a></span></div> <div class="gallerytext"><a href="/wiki/Tebygolrwydd" title="Tebygolrwydd">Plotio tebygolrwydd</a></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/Delwedd:UK_EU_referendum_polling_cy.svg" class="mw-file-description" title="Plotio gwasgariad"><img alt="Plotio gwasgariad" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/ab/UK_EU_referendum_polling_cy.svg/120px-UK_EU_referendum_polling_cy.svg.png" decoding="async" width="120" height="84" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/ab/UK_EU_referendum_polling_cy.svg/180px-UK_EU_referendum_polling_cy.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/ab/UK_EU_referendum_polling_cy.svg/240px-UK_EU_referendum_polling_cy.svg.png 2x" data-file-width="900" data-file-height="630" /></a></span></div> <div class="gallerytext"><a href="/w/index.php?title=Plotio_gwasgariad&action=edit&redlink=1" class="new" title="Plotio gwasgariad (nid yw'r dudalen yn bodoli)">Plotio gwasgariad</a></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/Delwedd:Spectramap_Biplot_Iris_Flower_Data_Set_FULL.jpg" class="mw-file-description" title="Plotio deuol"><img alt="Plotio deuol" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/22/Spectramap_Biplot_Iris_Flower_Data_Set_FULL.jpg/120px-Spectramap_Biplot_Iris_Flower_Data_Set_FULL.jpg" decoding="async" width="120" height="77" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/22/Spectramap_Biplot_Iris_Flower_Data_Set_FULL.jpg/180px-Spectramap_Biplot_Iris_Flower_Data_Set_FULL.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/22/Spectramap_Biplot_Iris_Flower_Data_Set_FULL.jpg/240px-Spectramap_Biplot_Iris_Flower_Data_Set_FULL.jpg 2x" data-file-width="1064" data-file-height="680" /></a></span></div> <div class="gallerytext">Plotio deuol</div> </li> </ul> <div class="mw-heading mw-heading2"><h2 id="Cyfeiriadau">Cyfeiriadau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Siart&veaction=edit&section=4" title="Golygu'r adran: Cyfeiriadau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Siart&action=edit&section=4" title="Edit section's source code: Cyfeiriadau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text">Cary Jensen, Loy Anderson (1992). <i>Harvard graphics 3: the complete reference</i>. Osborne McGraw-Hill <a href="/wiki/International_Standard_Book_Number" class="mw-redirect" title="International Standard Book Number">ISBN</a> <a href="/wiki/Arbennig:BookSources/0-07-881749-8" title="Arbennig:BookSources/0-07-881749-8">0-07-881749-8</a> p.413</span> </li> </ol></div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Wedi dod o "<a dir="ltr" href="https://cy.wikipedia.org/w/index.php?title=Siart&oldid=6091271">https://cy.wikipedia.org/w/index.php?title=Siart&oldid=6091271</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Arbennig:Categories" title="Arbennig:Categories">Categorïau</a>: <ul><li><a href="/wiki/Categori:Ffeithluniau" title="Categori:Ffeithluniau">Ffeithluniau</a></li><li><a href="/wiki/Categori:Diagramau" title="Categori:Diagramau">Diagramau</a></li><li><a href="/wiki/Categori:Siartiau" title="Categori:Siartiau">Siartiau</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Golygwyd y dudalen hon ddiwethaf ar 2 Medi 2018, am 06:32.</li> <li id="footer-info-copyright">Mae'r testun ar gael o dan <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-ShareAlike License</a>; gall telerau ychwanegol fod yn berthnasol. 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