roll_matrix

Source: idf/trk_idf/roll_matrix.pro

 ROLL_MATRIX
        Roll a pha matrix to bring the minimum E & DE to the left &
        bottom.

 Usage:
        rmatrix=roll_matrix(matrix)

 Return Value:
        rmatrix (as arg)        The roller 256x256 matrix
        
 Argument:
        matrix  any     input   A 256 by 256 matrix to roll (can be
                                any type.

 Keyword:
        unroll  ???     input   If set, then roll an unrolled matrix
                                back to the storage state.

 History:
        Original: 20/11/95; SJT
        Add UNROLL key: 27/11/95; SJT