mirror of
https://github.com/MontFerret/ferret.git
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acf2f13dcb
* sync with MontFerret/ferret * fix --param handling When params is converted to map it uses strings.Split, which slices a string into all substrings separated by :. * remove impossible conditions nil != nil * delete ineffectual assignments * replace '+= 1' with '++' * remove useless comparison with nil * merge variable declarations * remove bool comparison * fix imports * fix imports * delete unused file * use copy instead of loop * delete unused DummyInterface * remove unnecassary break statements * tidy modules
38 lines
881 B
Go
38 lines
881 B
Go
package math
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import (
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"context"
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"math"
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"github.com/MontFerret/ferret/pkg/runtime/core"
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"github.com/MontFerret/ferret/pkg/runtime/values"
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"github.com/MontFerret/ferret/pkg/runtime/values/types"
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)
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// StandardDeviationPopulation returns the population standard deviation of the values in a given array.
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// @params (Array) - Array of numbers.
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// @returns (Float) - The population standard deviation.
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func StandardDeviationPopulation(_ context.Context, args ...core.Value) (core.Value, error) {
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err := core.ValidateArgs(args, 1, 1)
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if err != nil {
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return values.None, err
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}
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err = core.ValidateType(args[0], types.Array)
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if err != nil {
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return values.None, err
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}
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arr := args[0].(*values.Array)
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if arr.Length() == 0 {
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return values.NewFloat(math.NaN()), nil
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}
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vp := variance(arr, values.NewInt(0))
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return values.NewFloat(math.Pow(float64(vp), 0.5)), nil
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}
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