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Demonstrate multiple units on financial timeseries sample #6119

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Mar 28, 2019
Merged

Demonstrate multiple units on financial timeseries sample #6119

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54 changes: 34 additions & 20 deletions samples/scales/time/financial.html
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Original file line number Diff line number Diff line change
Expand Up @@ -26,29 +26,41 @@
<option value="line">Line</option>
<option value="bar">Bar</option>
</select>
<select id="unit">
<option value="second">Second</option>
<option value="minute">Minute</option>
<option value="hour">Hour</option>
<option value="day" selected>Day</option>
<option value="month">Month</option>
<option value="year">Year</option>
</select>
<button id="update">update</button>
<script>
function randomNumber(min, max) {
return Math.random() * (max - min) + min;
}
function generateData() {
function randomNumber(min, max) {
return Math.random() * (max - min) + min;
}

function randomBar(date, lastClose) {
var open = randomNumber(lastClose * 0.95, lastClose * 1.05).toFixed(2);
var close = randomNumber(open * 0.95, open * 1.05).toFixed(2);
return {
t: date.valueOf(),
y: close
};
}
function randomBar(date, lastClose) {
var open = randomNumber(lastClose * 0.95, lastClose * 1.05).toFixed(2);
var close = randomNumber(open * 0.95, open * 1.05).toFixed(2);
return {
t: date.valueOf(),
y: close
};
}

var dateFormat = 'MMMM DD YYYY';
var date = moment('April 01 2017', dateFormat);
var data = [randomBar(date, 30)];
while (data.length < 60) {
date = date.clone().add(1, 'd');
if (date.isoWeekday() <= 5) {
data.push(randomBar(date, data[data.length - 1].y));
var date = moment('Jan 01 1990', 'MMM DD YYYY');
var now = moment();
var data = [randomBar(date, 30)];
var unit = document.getElementById('unit').value;
for (; data.length < 60 && date.isBefore(now); date = date.clone().add(1, unit)) {
if (date.isoWeekday() <= 5) {
data.push(randomBar(date, data[data.length - 1].y));
}
}

return data;
}

var ctx = document.getElementById('chart1').getContext('2d');
Expand All @@ -63,7 +75,7 @@
label: 'CHRT - Chart.js Corporation',
backgroundColor: color(window.chartColors.red).alpha(0.5).rgbString(),
borderColor: window.chartColors.red,
data: data,
data: generateData(),
type: 'line',
pointRadius: 0,
fill: false,
Expand Down Expand Up @@ -109,7 +121,9 @@

document.getElementById('update').addEventListener('click', function() {
var type = document.getElementById('type').value;
chart.config.data.datasets[0].type = type;
var dataset = chart.config.data.datasets[0];
dataset.type = type;
dataset.data = generateData();
chart.update();
});

Expand Down