The rows and columns of all matrices in matrix files are labelled
and these labels are displayed when the MAT LOAD operation is performed.
All MAT operations try to label the rows and the columns of the result
matrices according to the operands and to the nature of the operation.
For example, when a matrix is transposed or inverted, the row and column
labels are exchanged.
This 'label algebra' in conjunction with the automatic updating of the
matrix names makes the results more readable.
Column and row labels can be changed as follows:
MAT C(0,2)="sum" / label of column 2 will be "sum"
MAT C(5,0)="row5" / label of row 5 will be "row5"
MAT RLABELS FROM A TO B / row labels are copied from A to B
MAT CLABELS FROM A TO B / column labels are copied from A to B
MAT CLABELS "COMP" TO B / columns of B labelled by COMP1, COMP2,...
MAT RLABELS NUM(0) TO B / rows of B labelled by 0,1,2,...
MAT RLABELS NUM(5) TO B / rows of B labelled by 5,6,7,...
L = Literal row and column labels
M = More information on MAT operations
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