Singular Manual: ncols

  | ### 5.1.103 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
See matrix; nrows; size; smatrix.

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