This function evaluates the standard normal probability density function.
Function Return Value
ANORPR — Function value, the value of the probability density function. (Output)
Required Arguments
X — Argument for which the normal probability density function is to be evaluated. (Input)
FORTRAN 90 Interface
Generic: ANORPR (X)
Specific: The specific interface names are S_NORPR and D_NORPR.
FORTRAN 77 Interface
Single: ANORPR (X)
Double: The double precision name is DNORPR.
Description
The function ANORPR evaluates the normal probability density function, defined as
.
Example
In this example, we evaluate the probability function at X = 0.5.
USE
UMACH_INT
USE
ANORPR_INT
IMPLICIT NONE
INTEGER NOUT
REAL X, PR
CALL UMACH(2, NOUT)
X = 0.5
PR = ANORPR(X)
WRITE (NOUT, 99999) X, PR
99999 FORMAT (' ANORPR(', F4.2, ') = ', F6.4)
END
Output
ANORPR(0.50) = 0.3521
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