73 lines
1.4 KiB
Plaintext
73 lines
1.4 KiB
Plaintext
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{{alias}}( x, k )
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Evaluates the cumulative distribution function (CDF) for a chi-squared
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distribution with degrees of freedom `k` at a value `x`.
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If provided `NaN` as any argument, the function returns `NaN`.
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If provided `k < 0`, the function returns `NaN`.
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Parameters
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----------
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x: number
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Input value.
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k: number
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Degrees of freedom.
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Returns
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-------
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out: number
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Evaluated CDF.
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Examples
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--------
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> var y = {{alias}}( 2.0, 3.0 )
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~0.428
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> y = {{alias}}( 1.0, 0.5 )
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~0.846
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> y = {{alias}}( -1.0, 4.0 )
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0.0
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> y = {{alias}}( NaN, 1.0 )
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NaN
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> y = {{alias}}( 0.0, NaN )
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NaN
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// Negative degrees of freedom:
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> y = {{alias}}( 2.0, -1.0 )
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NaN
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// Degenerate distribution when `k = 0`:
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> y = {{alias}}( 2.0, 0.0 )
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1.0
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> y = {{alias}}( -2.0, 0.0 )
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0.0
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> y = {{alias}}( 0.0, 0.0 )
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0.0
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{{alias}}.factory( k )
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Returns a function for evaluating the cumulative distribution function (CDF)
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of a chi-squared distribution with degrees of freedom `k`.
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Parameters
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----------
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k: number
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Degrees of freedom.
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Returns
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-------
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cdf: Function
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Cumulative distribution function (CDF).
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Examples
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--------
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> var mycdf = {{alias}}.factory( 1.0 );
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> var y = mycdf( 2.0 )
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~0.843
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> y = mycdf( 1.2 )
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~0.727
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See Also
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--------
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