Previous Up Next

5.49.15  Remove rows or columns of a matrix: delrows delcols

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:

delrows([[1,2,3],[4,5,6],[7,8,9]],1..1)

Output:

[[1,2,3],[7,8,9]]

Input:

delrows([[1,2,3],[4,5,6],[7,8,9]],0..1)

Output:

[[7,8,9]]

Input:

delcols([[1,2,3],[4,5,6],[7,8,9]],1..1)

Output:

[[1,3],[4,6],[7,9]]

Input:

delcols([[1,2,3],[4,5,6],[7,8,9]],0..1)

Output:

[[3],[6],[9]]

Previous Up Next