MXFACTOR mat1 mat2 X (LEVEL n
Factors the input matrix file mat1.ufm by X to output file mat2.ufm; ie
If a level n is defined for a stacked matrix then the factoring is applied to that level only; otherwise the factor is applied to the entire stacked matrix. N.B. Similar to the interactive process to select a single level; see 10.7.2.