[英]chart js chart bar chart not showing data from 0
我有一個圖表js條形圖。 它沒有顯示來自0的數據。如果具有值3和7,則圖形將3作為y軸起點,將7作為最高軸。 類似地,如果我有5和8,則第一欄將變為空白,第二欄可見。
我補充說:
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
}
我的代碼:
$(document).ready(function () {
showGraph();
});
function showGraph()
{
{
$.post("data.php",
function (data)
{
console.log(data);
var name = [];
var marks = [];
for (var i in data) {
name.push(data[i].label);
marks.push(data[i].y);
}
console.log(name);
console.log(marks);
var chartdata = {
labels: name,
datasets: [
{
label: 'Student Marks',
backgroundColor: '#49e2ff',
borderColor: '#46d5f1',
hoverBackgroundColor: '#CCCCCC',
hoverBorderColor: '#666666',
data: marks
}
]
};
var graphTarget = $("#graphCanvas");
var barGraph = new Chart(graphTarget, {
type: 'bar',
data: chartdata
});
});
}
}
嘗試選項ticks.beginAtZero
,請參閱以下工作片段...
$(document).ready(function() { var chartdata = { labels: ['a', 'b'], datasets: [{ label: 'Student Marks', backgroundColor: '#49e2ff', borderColor: '#46d5f1', hoverBackgroundColor: '#CCCCCC', hoverBorderColor: '#666666', data: [3, 7] }] }; var graphTarget = $("#graphCanvas"); var barGraph = new Chart(graphTarget, { type: 'bar', data: chartdata, options: { scales: { yAxes: [{ ticks: { beginAtZero: true } }] } } }); });
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.bundle.min.js"></script> <canvas id="graphCanvas"></canvas>
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