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cdfgam_p

Calculates the integral of a cumulative gamma distribution function.

Prototype

	function cdfgam_p (
		x      : numeric,  
		shape  : numeric,  
		scale  : numeric   
	)

	return_val  :  numeric

Arguments

x

A multi-dimensional array or scalar value equal to upper limit of integration of the gamma density. (x ≥ 0.)

shape

A multi-dimensional array or scalar value equal to the scale parameter of the gamma density (shape > 0.0)

scale

A multi-dimensional array or scalar value equal to the shape parameter of the gamma density (scale > 0.0)

Return value

A array of the same size as x. Double if any of the input arguments are double, float otherwise.

Description

Calculates the intergral of a cumulative gamma distribution function.

The source code is from source routine "CDFGAM" from DCDFLIB (Double precision Cumulative Distribution Function LIBrary)

See Also

cdfgam_x

Examples

Example 1

     x = 6.29579
     shape = 3.0
     scale = 1.0

     P = cdfgam_p(x,shape,scale)
     print("P="+P)               ; P = 0.95