incomplete_gamma

Description

Incomplete Gamma functions (a,x)

Syntax

double incomplete_gamma( double a, double x )

Parameters

a

[input] the argument a of the function

x

[input] the argument x of the function

Return

Returns the values for the incomplete gamma function P(a,x)

Examples

EX1

void incomplete_gamma_ex1()
{
        double a[5] = {2,7,0.5,20.0,21.0};
        double x[5] = {3.0,1.0,99.0,21.0,20.0};
        double dResult[5];
        for(int ii=0;ii<5; ii++)
        {
                dResult[ii] = incomplete_gamma(a[ii],x[ii]);
                printf("%4.1f  %4.1f:  %12.4e\n",a[ii],x[ii],dResult[ii]);
        }
}

Remark

See Also

gamma, log_gamma

header to Include

origin.h

Reference