热图 js 最小值 0

Question

我正在尝试使用"热图js"库绘制热图。 对于某些输入值，如果最小值为 0，最大值为 1，则整个热图将为红色，而不是绘制实际值。 如果最大值不是 1(例如最小值：0、最大值 2 或最小值：0、最大值：3(，则它可以正常工作，但仅在这种情况下，热图无法映射数据。

var data = null;
/* this set of data works fine though */
values = [{
"uid": "1",
"x": 100,
"y": 200,
"value": 0
},
{
"uid": "2",
"x": 100,
"y": 220,
"value": 0
},
{
"uid": "22",
"x": 100,
"y": 240,
"value": 0
},
{
"uid": "30",
"x": 100,
"y": 260,
"value": 0
},
{
"uid": "39",
"x": 100,
"y": 280,
"value": 0
},
{
"uid": "70",
"x": 100,
"y": 300,
"value": 1
},
{
"uid": "75",
"x": 120,
"y": 200,
"value": 0
},
{
"uid": "84",
"x": 140,
"y": 200,
"value": 1
},
{
"uid": "85",
"x": 160,
"y": 200,
"value": 1
},
{
"uid": "104",
"x": 180,
"y": 200,
"value": 0
},
{
"uid": "105",
"x": 200,
"y": 200,
"value": 0
}
];
var heatmap = h337.create({
container: $("#testcanvas").get(0)
});
data = {
max: 1,
min: 0,
data: values
}
heatmap.setData(data);
heatmap.repaint();

#testcanvas {
width: 600px;
height: 600px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://rawgit.com/pa7/heatmap.js/master/build/heatmap.js"></script>
<div id="testcanvas"></div>

Answer 1

如果我正确理解你的问题，那么我想脚本理解 0 = 假和 1 = 真，所以你需要将 0 传递为"0"，将 1 传递为"1">

var data = null;
/* this set of data works fine though */
values = [{
"uid": "1",
"x": 100,
"y": 200,
"value": "0"
},
{
"uid": "2",
"x": 100,
"y": 220,
"value": "0"
},
{
"uid": "22",
"x": 100,
"y": 240,
"value": "0"
},
{
"uid": "30",
"x": 100,
"y": 260,
"value": "0"
},
{
"uid": "39",
"x": 100,
"y": 280,
"value": "0"
},
{
"uid": "70",
"x": 100,
"y": 300,
"value": "1"
},
{
"uid": "75",
"x": 120,
"y": 200,
"value": "0"
},
{
"uid": "84",
"x": 140,
"y": 200,
"value": "1"
},
{
"uid": "85",
"x": 160,
"y": 200,
"value": "1"
},
{
"uid": "104",
"x": 180,
"y": 200,
"value": "0"
},
{
"uid": "105",
"x": 200,
"y": 200,
"value": "0"
}
];
var heatmap = h337.create({
container: $("#testcanvas").get(0)
});
data = {
max: "1",
min: "0",
data: values
}
heatmap.setData(data);
heatmap.repaint();

#testcanvas {
width: 600px;
height: 600px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://rawgit.com/pa7/heatmap.js/master/build/heatmap.js"></script>
<div id="testcanvas"></div>