UNDDF
This function evaluates the discrete uniform cumulative distribution function.
Function Return Value
UNDDF — Function value, the probability that a uniform random variable takes a value less than or equal to IX. (Output)
Required Arguments
IX — Argument for which the discrete uniform cumulative distribution function is to be evaluated. (Input)
N — Scale parameter. N must be greater than 0. (Input)
FORTRAN 90 Interface
Generic: UNDDF (IX, N)
Specific: The specific interface names are S_UNDDF and D_UNDDF.
FORTRAN 77 Interface
Single: UNDDF (IX, N)
Double: The double precision name is DUNDDF.
Description
The notation below uses the floor and ceiling function notation,
and
.
The function UNDDF evaluates the discrete uniform cumulative probability distribution function with scale parameter N, defined
Example
In this example, we evaluate the probability function at IX = 3, N = 5.
USE UMACH_INT
USE UNDDF_INT
IMPLICIT NONE
INTEGER NOUT, IX, N
REAL PR
CALL UMACH(2, NOUT)
IX = 3
N = 5
PR = UNDDF(IX, N)
WRITE (NOUT, 99999) IX, N, PR
99999 FORMAT (' UNDDF(', I2, ', ', I2, ') = ', F6.4)
END
Output
UNDDF( 3, 5) = 0.6000
