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Fix data in financial sample #6244

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merged 7 commits into from
May 15, 2019
Merged

Fix data in financial sample #6244

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31e4a94
Fix data in financial sample
benmccann May 4, 2019
cd0b4f6
Fix lint errors
benmccann May 5, 2019
809b3d8
Fix skipping too many days for smaller units
benmccann May 6, 2019
0b072aa
Start on Jan 1 for hour
benmccann May 6, 2019
a18eaf2
Fix day unit
benmccann May 7, 2019
2762805
Change > to >=
benmccann May 8, 2019
8a971d2
Add note
benmccann May 9, 2019
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36 changes: 32 additions & 4 deletions samples/scales/time/financial.html
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@

<body>
<div style="width:1000px">
<p>This example demonstrates a time series scale by drawing a financial line chart using just the core library. For more specific functionality for financial charts, please see <a href="https://github.com/chartjs/chartjs-chart-financial">chartjs-chart-financial</a></p>
<canvas id="chart1"></canvas>
</div>
<br>
Expand All @@ -37,6 +38,27 @@
<button id="update">update</button>
<script>
function generateData() {
var unit = document.getElementById('unit').value;

function unitLessThanDay() {
return unit === 'second' || unit === 'minute' || unit === 'hour';
}

function beforeNineThirty(date) {
return date.hour() < 9 || (date.hour() === 9 && date.minute() < 30);
}

// Returns true if outside 9:30am-4pm on a weekday
function outsideMarketHours(date) {
if (date.isoWeekday() > 5) {
return true;
}
if (unitLessThanDay() && (beforeNineThirty(date) || date.hour() > 16)) {
return true;
}
return false;
}

function randomNumber(min, max) {
return Math.random() * (max - min) + min;
}
Expand All @@ -53,11 +75,17 @@
var date = moment('Jan 01 1990', 'MMM DD YYYY');
var now = moment();
var data = [];
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.length > 0 ? data[data.length - 1].y : 30));
var lessThanDay = unitLessThanDay();
for (; data.length < 60 && date.isBefore(now); date = date.clone().add(1, unit).startOf(unit)) {
if (outsideMarketHours(date)) {
if (!lessThanDay || !beforeNineThirty(date)) {
date = date.clone().add(date.isoWeekday() >= 5 ? 8 - date.isoWeekday() : 1, 'day');
}
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if (lessThanDay) {
date = date.hour(9).minute(30).second(0);
}
}
data.push(randomBar(date, data.length > 0 ? data[data.length - 1].y : 30));
}

return data;
Expand Down