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cdfchi_p

Calculates the intergral of a cumulative chi-square distribution function.

Prototype

	function cdfchi_p (
		x   : numeric,  
		df  : numeric   
	)

	return_val  :  numeric

Arguments

x

A multi-dimensional array or scalar value equal to upper limit of integration of the chi-square distribution.

df

A multi-dimensional array or scalar value equal to the number of degrees of freedom of the chi-square distribution (0, +infinity).

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 chi-square distribution function.

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

See Also

Examples

begin
  X  = 11.0705
  P  = cdfchi_p(
  print ("P="+P+"   df="+df+"   X="+X)
;  (0)     P=0.95   df=5    X=11.0705      
end