FNLMath : Utilities : PGOPT
PGOPT
Sets or retrieves page width and length for printing.
Required Arguments
IOPT — Page attribute option. = (Input)
IOPT Description of Attribute
1, 1 Page width.
2, 2 Page length.
Negative values of IOPT indicate the setting IPAGE is input. Positive values of IOPT indicate the setting IPAGE is output.
IPAGE — Value of page attribute. = (Input, if IOPT is negative; output, if IOPT is positive.)
IOPT Description of Attribute Settings for IPAGE
1, 1 Page width (in characters) 10, 11, …
2, 2 Page length (in lines) =  10, 11, …
FORTRAN 90 Interface
Generic: CALL PGOPT (IOPT, IPAGE)
Specific: The specific interface name is PGOPT.
FORTRAN 77 Interface
Single: CALL PGOPT (IOPT, IPAGE)
Description
Routine PGOPT is used to set or retrieve the page width or the page length for routines that perform printing.
Example
The following example illustrates the use of PGOPT to set the page width at 20 characters. Routine WRRRN is then used to print a 3 × 4 matrix A where aij= i + j/10.

USE PGOPT_INT
USE WRRRN_INT

IMPLICIT NONE
INTEGER ITRING, LDA, NCA, NRA
PARAMETER (ITRING=0, LDA=3, NCA=4, NRA=3)
!
INTEGER I, IOPT, IPAGE, J
REAL A(LDA,NCA)
!
DO 20 I=1, NRA
DO 10 J=1, NCA
A(I,J) = I + J*0.1
10 CONTINUE
20 CONTINUE
! Set page width.
IOPT = -1
IPAGE = 20
CALL PGOPT (IOPT, IPAGE)
! Print the matrix A.
CALL WRRRN ('A', A)
END
Output

A
1 2
1 1.100 1.200
2 2.100 2.200
3 3.100 3.200

3 4
1 1.300 1.400
2 2.300 2.400
3 3.300 3.400