我只是試圖在一些從某些PHP收集的線圖上繪製一些基本的X和Y點。Chart.JS TypeError:this.scale is undefined
在表單提交上,我做了一個ajax文章來獲取圖表的點數。然後運行一個應該創建圖的JS函數。我不斷收到「this.scale是未定義的」,圖中沒有顯示任何內容/崩潰。
HTML
<canvas id="cv" height="50"></canvas>
編輯:
這是JSON正在PHP設置正在從後發回。 $日期只是以下日期相同$ num_added是以下數據點。
$ds['labels'] = $dates;
$ds['datasets'][]=array('label' => $tid,'fillColor' => 'rgba(220,220,220,0.2)','strokeColor' =>'rgba(220,220,220,1)','pointColor' => 'rgba(220,220,220,1)','pointStrokeColor' => '#fff','pointHighlightFill' => '#fff','pointHighlightStroke' => 'rgba(220,220,220,1)','data' => $num_added);
print json_encode($ds);
阿賈克斯後,其在線返回
{
"labels":[ "2016-01-10","2016-01-12","2016-01-13","2016-01-14","2016-01-15","2016-01-16","2016-01-17","2016-01-18","2016-01-19","2016-01-21","2016-01-22","2016-01-24","2016-01-26","2016-01-27","2016-01-29","2016-01-30","2016-01-31","2016-02-01","2016-02-02","2016-02-03","2016-02-04","2016-02-05","2016-02-06","2016-02-07","2016-02-08","2016-02-10"],
"datasets":[
{
"label":"XYZ",
"fillColor":"rgba(220,220,220,0.2)",
"strokeColor":"rgba(220,220,220,1)",
"pointColor":"rgba(220,220,220,1)",
"pointStrokeColor":"#fff",
"pointHighlightFill":"#fff",
"pointHighlightStroke":"rgba(220,220,220,1)",
"data":["1483","2044","834","818","1215","1534","823","1368","3048","4808","4486","6488","1340","4260","1863","5309","1259","858","4041","7444","4514","3994","3574","1419","1383","1825"]
}
]}
JSON對象這是例相同的格式給你這就是爲什麼我在搞清楚了這一點
一旦我難倒得到我發送給我的js函數line_graph(「cv」,data)的點來繪製線條的圖形,但這是它崩潰的地方。這對我來說沒有意義,因爲我從thr文檔中得到了正確的結果。
function line_graph(holder, data){
Chart.defaults.global.animation = true;
Chart.defaults.global.animationSteps = 60;
Chart.defaults.global.animationEasing = "easeOutQuart";
Chart.defaults.global.showScale = true;
Chart.defaults.global.scaleOverride = false;
Chart.defaults.global.scaleLineColor ="rgba(0,0,0,.1)";
Chart.defaults.global.scaleLineWidth = 1;
Chart.defaults.global.scaleShowLabels = true;
Chart.defaults.global.scaleLabel = "<%=value%>";
Chart.defaults.global.scaleIntegersOnly = true;
Chart.defaults.global.scaleBeginAtZero = false;
Chart.defaults.global.scaleFontFamily = "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif";
Chart.defaults.global.scaleFontSize = 12;
Chart.defaults.global.scaleFontStyle = "normal";
Chart.defaults.global.scaleFontColor = "#666";
Chart.defaults.global.responsive = true;
Chart.defaults.global.maintainAspectRatio = true;
Chart.defaults.global.showTooltips = true;
Chart.defaults.global.tooltipEvents = ["mousemove", "touchstart", "touchmove"];
Chart.defaults.global.tooltipFillColor = "rgba(0,0,0,0.8)";
Chart.defaults.global.tooltipFontFamily = "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif";
Chart.defaults.global.tooltipFontSize = 14;
Chart.defaults.global.tooltipFontStyle = "normal";
Chart.defaults.global.tooltipFontColor = "#fff";
Chart.defaults.global.tooltipTitleFontFamily = "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif";
Chart.defaults.global.tooltipTitleFontSize = 14;
Chart.defaults.global.tooltipTitleFontStyle = "bold";
Chart.defaults.global.tooltipTitleFontColor = "#fff";
Chart.defaults.global.tooltipYPadding = 6;
Chart.defaults.global.tooltipXPadding = 6;
Chart.defaults.global.tooltipCaretSize = 8;
Chart.defaults.global.tooltipCornerRadius = 6;
Chart.defaults.global.tooltipXOffset = 10;
Chart.defaults.global.tooltipTemplate = "<%if (label){%><%=label%>: <%}%><%= value %>";
Chart.defaults.global.multiTooltipTemplate = "<%= value %>";
var ctx = document.getElementById(holder).getContext("2d");
var myLineChart = new Chart(ctx).Line(data, {
scaleShowGridLines : true,
scaleGridLineColor : "rgba(0,0,0,.05)",
scaleGridLineWidth : 1,
scaleShowHorizontalLines: true,
scaleShowVerticalLines: true,
bezierCurve : true,
bezierCurveTension : 0.4,
pointDot : true,
pointDotRadius : 4,
pointDotStrokeWidth : 1,
pointHitDetectionRadius : 20,
datasetStroke : true,
datasetStrokeWidth : 2,
datasetFill : true,
legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokeColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"
});
}
該圖的工作原理是,如果我只是硬編碼數據到函數中,但顯然這是毫無價值的。我已經嘗試了所有我能想到的東西,所以我認爲有人可能會遇到這個問題。它是一個簡單的Ajax來獲取數據,然後顯示令人討厭的點,因爲它是一個簡單的過程。我知道我只是缺少這是我第一次與chart.js
在函數的第一行中執行警報(data.datasets [0] .label)。如果您遇到錯誤,則說明您的JSON沒有正確解釋。 – potatopeelings
我覺得它是未定義的。我要上傳我如何設置我的JSON。你認爲你可以快速瀏覽一下嗎? – workingxx
也是數據未定義?因爲你可能需要一些類似的東西'print(「var data =」。json_encode($ ds));' – potatopeelings