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5.1.104 ncols
Syntax:
ncols ( matrix_expression )
ncols ( smatrix_expression )
ncols ( intmat_expression )
ncols ( ideal_expression )
Type:
- int
Purpose:
- returns the number of columns of a matrix, 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
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See
matrix;
nrows;
size;
smatrix.
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