Inquiry Functions in Matrices

The NCol() and NRow() functions return the number of columns and rows in a matrix (or data table), respectively:

NCol( [1 2 3, 4 5 6] ); // returns 3 (for 3 columns)

NRow( [1 2 3, 4 5 6] ); // returns 2 (for 2 rows)

To determine whether a value is a matrix, use the Is Matrix() function, which returns a 1 if the argument evaluates to a matrix.

A = [20, 64, 3];

B = {20, 64, 3};

Is Matrix( A ); // returns 1 for yes

Is Matrix( B ); // returns 0 for no

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