nimare.utils.unique_rows

unique_rows(ar)[source]

Remove repeated rows from a 2D array.

In particular, if given an array of coordinates of shape (Npoints, Ndim), it will remove repeated points.

Parameters

ar (2-D ndarray) – The input array.

Returns

ar_out – A copy of the input array with repeated rows removed.

Return type

2-D ndarray

:raises ValueError : if ar is not two-dimensional.:

Notes

The function will generate a copy of ar if it is not C-contiguous, which will negatively affect performance for large input arrays.

This is taken from skimage. See skimage.util.unique_rows().

Examples

>>> ar = np.array([[1, 0, 1],
...                [0, 1, 0],
...                [1, 0, 1]], np.uint8)
>>> unique_rows(ar)
array([[0, 1, 0],
       [1, 0, 1]], dtype=uint8)

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