Matrix windows

class sage.matrix.matrix_window.MatrixWindow

Bases: object

add(A)

add_prod(A, B)

echelon_in_place()

Calculate the echelon form of this matrix, returning the list of pivot columns

element_is_zero(i, j)

get_unsafe(i, j)

matrix()

Returns the underlying matrix that this window is a view of.

matrix_window(row, col, n_rows, n_cols)

Returns a matrix window relative to this window of the underlying matrix.

ncols()

new_empty_window(nrows, ncols)

new_matrix_window(matrix, row, col, n_rows, n_cols)

This method is here only to provide a fast cdef way of constructing new matrix windows. The only implicit assumption is that self._matrix and matrix are over the same base ring (so share the zero).

nrows()

set(src)

set_to(A)

Change self, making it equal A.

set_to_diff(A, B)

set_to_prod(A, B)

set_to_sum(A, B)

set_to_zero()

set_unsafe(i, j, x)

subtract(A)

subtract_prod(A, B)

swap_rows(a, b)

to_matrix()

Returns an actual matrix object representing this view.