Source code for mars.tensor.base.flipud

#!/usr/bin/env python
# -*- coding: utf-8 -*-
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from .flip import flip


[docs]def flipud(m): """ Flip tensor in the up/down direction. Flip the entries in each column in the up/down direction. Rows are preserved, but appear in a different order than before. Parameters ---------- m : array_like Input tensor. Returns ------- out : array_like A view of `m` with the rows reversed. Since a view is returned, this operation is :math:`\\mathcal O(1)`. See Also -------- fliplr : Flip tensor in the left/right direction. rot90 : Rotate tensor counterclockwise. Notes ----- Equivalent to ``m[::-1,...]``. Does not require the tensor to be two-dimensional. Examples -------- >>> import mars.tensor as mt >>> A = mt.diag([1.0, 2, 3]) >>> A.execute() array([[ 1., 0., 0.], [ 0., 2., 0.], [ 0., 0., 3.]]) >>> mt.flipud(A).execute() array([[ 0., 0., 3.], [ 0., 2., 0.], [ 1., 0., 0.]]) >>> A = mt.random.randn(2,3,5) >>> mt.all(mt.flipud(A) == A[::-1,...]).execute() True >>> mt.flipud([1,2]).execute() array([2, 1]) """ return flip(m, 0)