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Add trigonometric filter operators (#6127)

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* Added missing trigonometrics filter operators

This PR adds support to trigonometry operators, allowing to create spider graphs and other geometric shapes with filters.

* Adds the missing trigonometric filter operators

This PR adds support to the missing trigonometric filter operators (cos, sin, tan, acos, asin, atan, atan2), allowing to create spider graphs, [pie charts, donut charts, polar charts](https://ffoodd.github.io/chaarts/pie-charts.html) and other geometric shapes with filters, which was previously not possible without add-ons.

Example :

`[[2]cos[]] = -0.4161468365471424`

See also this radar chart made in wikitext by @saqimtiaz using the new trigonometric operators :
https://saqimtiaz.github.io/sq-tw/temp/radar-chart-demo.html
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Telumire 2021-10-19 16:56:08 +02:00 committed by GitHub
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commit 1f6ef07860
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29
core/modules/filters/math.js
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@ -165,6 +165,35 @@ exports["standard-deviation"] = makeNumericReducingOperator(
}
);
//trigonometry
exports.cos = makeNumericBinaryOperator(
function(a) {return Math.cos(a)}
);
exports.sin = makeNumericBinaryOperator(
function(a) {return Math.sin(a)}
);
exports.tan = makeNumericBinaryOperator(
function(a) {return Math.tan(a)}
);
exports.acos = makeNumericBinaryOperator(
function(a) {return Math.acos(a)}
);
exports.asin = makeNumericBinaryOperator(
function(a) {return Math.asin(a)}
);
exports.atan = makeNumericBinaryOperator(
function(a) {return Math.atan(a)}
);
exports.atan2 = makeNumericBinaryOperator(
function(a) {return Math.atan2(a)}
);
//Calculate the variance of a population of numbers in an array given its mean
function getVarianceFromArray(values,mean) {
var deviationTotal = values.reduce(function(accumulator,value) {