delrows (resp. delcols) removes one or several rows (resp.
columns) of a matrix.
delrows (resp. delcols) takes 2 arguments : a matrix A, and
an interval n1..n2.
delrows (resp. delcols) returns the matrix where the rows
(resp. columns) of index from n1 to n2 of A are removed.
Input :
Output :
Input :
Output :
Input :
Output :
Input :
Output :