This tool is useful for basic matrix operations:

Transposing the input matrix.
Turning a submatrix of a matrix into an explicit matrix.
Computing the support matrix of the input matrix.
Computing the signed support matrix (negative entries are turned into \( -1 \)'s, positive into \( +1 \)'s) of the input matrix.

Matrix Utilities

The command

cmr-matrix IN-MAT OUT-MAT [OPTION]...

copies the matrix from file IN-MAT to file OUT-MAT, potentially applying certain operations.

Options:

-i FORMAT Format of file IN-MAT; default: dense.
-o FORMAT Format of file OUT-MAT; default: same as format of IN-MAT.
-S IN-SUB Consider the submatrix of IN-MAT specified in file IN-SUB instead of IN-MAT itself; can be combined with other operations.
-t Transpose the matrix; can be combined with other operations.
-c Compute the support matrix instead of copying.
-C Compute the signed support matrix instead of copying.
-r Randomize the output matrix by randomly permuting rows/columns.
-R2 NUM Randomize the output matrix by performing NUM binary random pivots.
-R3 NUM Randomize the output matrix by performing NUM ternary random pivots.
-d Use double arithmetic instead of integers.

Formats for matrices: dense, sparse If IN-MAT or IN-SUB is - then the input matrix (resp. submatrix) is read from stdin. If OUT-MAT is - then the output matrix is written to stdout.