5.1.83 ncols

Syntax:

ncols ( matrix_expression )
ncols ( intmat_expression )
ncols ( ideal_expression )

Type:

int

Purpose:

returns the number of columns of a matrix or an intmat or the number of given generators of the ideal, including zeros.

Note:

size(ideal) counts the number of generators which are different from zero. (Use nrows to get the number of rows of a given matrix or intmat.)

Example:

ring r; matrix m[5][6]; ncols(m); → 6 ideal i=x,0,y; ncols(i); → 3 size(i); → 2

See matrix; nrows; size.