numpy.unique_inverse#

numpy.unique_inverse(x)[source]#

Find the unique elements ofx and indices to reconstructx.

This function is an Array API compatible alternative to:

np.unique(x,return_inverse=True,equal_nan=False,sorted=False)

but returns a namedtuple for easier access to each output.

Note

This function currently always returns a sorted result, however,this could change in any NumPy minor release.

Parameters:

xarray_like

Input array. It will be flattened if it is not already 1-D.

Returns:

outnamedtuple

The result containing:

• values - The unique elements of an input array.

• inverse_indices - The indices from the set of unique elementsthat reconstructx.

See also

unique

Find the unique elements of an array.

Examples

Try it in your browser!

>>>importnumpyasnp>>>x=[1,1,2]>>>uniq=np.unique_inverse(x)>>>uniq.valuesarray([1, 2])>>>uniq.inverse_indicesarray([0, 0, 1])

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