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我的代碼:使用不同的顏色在圖表
<div><canvas id="canvas_line" height="200" width="800"></canvas></div>
<div><canvas id="canvas_bar" height="200" width="800"></canvas></div>
<script>
var lineChartData = {
labels : ["14:00","15:00","16:00","17:00","18:00","19:00","20:00","22:00"],
datasets : [
{
label: "CPU IDLE",
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 : [85,35,65,59,90,81,56,55,40,100]
}
]
}
var barChartData = {
labels : ["12:00","13:00","14:00","15:00","16:00","17:00","18:00","19:00","20:00","22:00"],
datasets : [
{
fillColor : "rgba(220,220,220,0.5)",
strokeColor : "rgba(220,220,220,1)",
data : [85,35,65,59,90,81,56,55,40,100]
}
]
}
var ctx_line = document.getElementById("canvas_line").getContext("2d");
window.myLine = new Chart(ctx_line).Line(lineChartData, {
responsive: true
});
var ctx_bar = document.getElementById("canvas_bar").getContext("2d");
window.myLine = new Chart(ctx_bar).Bar(barCharData, {
responsive: true
});
</script>
它看起來像this,一切都是灰色的。
但我想變更下面是應用於LineChart的pointColor
和BARCHART的fillcolor
到紅色如果它的數據是以上,數據仍然灰暗。
我想要它像this,但我不知道如何在畫布中使用不同的顏色。
<!DOCTYPE html>
<html>
<head>
<title>123</title>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script type="text/javascript" src="http://apps.bdimg.com/libs/Chart.js/0.2.0/Chart.min.js"></script>
</head>
<body>
<canvas id="chartCanvas" height="200" width="800"></canvas>
<script>
$(document).ready(function() {
var chartData = {
labels: ["12:00","13:00","14:00","15:00","16:00","17:00","18:00","19:00","20:00","22:00"],
datasets: [
{
data : [85,35,65,59,90,81,56,55,40,100],
fillColor: 'rgba(220,220,220,0.2)',
strokeColor: 'rgba(220,220,220,1)'
}
]
}
var chartCanvas = document.getElementById("chartCanvas").getContext("2d");
var barChart = new Chart(chartCanvas).Bar(chartData, {responsive: true});
// Set warning color
var bars = barChart.datasets[0].bars;
for(var i = 0; i < bars.length ; i++) {
if(bars[i].value > 80) {
bars[i].fillColor = "rgba(255, 0, 0, 0.2)";
bars[i].strokeColor = "rgba(220, 0, 0, 0.5)";
}
}
// Update the chart
barChart.update();
});
</script>
</body>
</html>
Linus,謝謝!我知道了。但是你的代碼在我的Mac上不起作用。我創建了一個新的html文件並在小提琴上填充了相同的代碼,顏色沒有改變。 –
但小提琴奏效了嗎?你不能只複製它,你必須把它放在一個文件準備回調。 – Linus
「錯誤:123:36未捕獲TypeError:無法讀取未定義的屬性'0'var bars = barChart.datasets [0] .bars;' –