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8.256 SPREAD — Add a dimension to an array ¶

Description:

Replicates a SOURCE array NCOPIES times along a specified dimension DIM.

Standard:

Fortran 90 and later

Class:

Transformational function

Syntax:

RESULT = SPREAD(SOURCE, DIM, NCOPIES)

Arguments:

SOURCE	Shall be a scalar or an array of any type and a rank less than seven.
DIM	Shall be a scalar of type INTEGER with a value in the range from 1 to n+1, where n equals the rank of SOURCE.
NCOPIES	Shall be a scalar of type INTEGER.

Return value:

The result is an array of the same type as SOURCE and has rank n+1 where n equals the rank of SOURCE.

Example:

PROGRAM test_spread
  INTEGER :: a = 1, b(2) = (/ 1, 2 /)
  WRITE(*,*) SPREAD(A, 1, 2)            ! "1 1"
  WRITE(*,*) SPREAD(B, 1, 2)            ! "1 1 2 2"
END PROGRAM

See also:

UNPACK — Unpack an array of rank one into an array