Singular

4.7.1 intmat declarations

Syntax:

intmat name = intmat_expression ;
intmat name [ rows ] [ cols ] = intmat_expression ;
intmat name [ rows ] [ cols ] = list_of_int_and_intvec_and_intmat_expressions ;
rows and cols must be positive int expressions.

Purpose:

defines an intmat variable.
Given a list of integers, the matrix is filled up with the first row from the left to the right, then the second row and so on. If the int_list contains less than rows*cols elements, the matrix is filled up with zeros; if it contains more elements, only the first rows*cols elements are used.

Default:

0 (1 x 1 matrix)

Example:

intmat im[3][5]=1,3,5,7,8,9,10,11,12,13; im; ==> 1,3,5,7,8, ==> 9,10,11,12,13, ==> 0,0,0,0,0 im[3,2]; ==> 0 intmat m[2][3] = im[1..2,3..5]; // defines a submatrix m; ==> 5,7,8, ==> 11,12,13