dask.array.rot90

dask.array.rot90¶

dask.array.rot90(m, k=1, axes=(0, 1))[source]¶

Rotate an array by 90 degrees in the plane specified by axes.

This docstring was copied from numpy.rot90.

Some inconsistencies with the Dask version may exist.

Rotation direction is from the first towards the second axis. This means for a 2D array with the default k and axes, the rotation will be counterclockwise.

Parameters

marray_like: Array of two or more dimensions.
kinteger: Number of times the array is rotated by 90 degrees.
axes(2,) array_like: The array is rotated in the plane defined by the axes. Axes must be different.

Returns

yndarray: A rotated view of m.

See also

flip: Reverse the order of elements in an array along the given axis.
fliplr: Flip an array horizontally.
flipud: Flip an array vertically.

Notes

rot90(m, k=1, axes=(1,0)) is the reverse of rot90(m, k=1, axes=(0,1))

rot90(m, k=1, axes=(1,0)) is equivalent to rot90(m, k=-1, axes=(0,1))

Examples

>>> import numpy as np  
>>> m = np.array([[1,2],[3,4]], int)  
>>> m  
array([[1, 2],
       [3, 4]])
>>> np.rot90(m)  
array([[2, 4],
       [1, 3]])
>>> np.rot90(m, 2)  
array([[4, 3],
       [2, 1]])
>>> m = np.arange(8).reshape((2,2,2))  
>>> np.rot90(m, 1, (1,2))  
array([[[1, 3],
        [0, 2]],
       [[5, 7],
        [4, 6]]])

dask.array.rollaxis

dask.array.round