numpy.chararray.sort — NumPy v1.11 Manual (original) (raw)
chararray.sort(axis=-1, kind='quicksort', order=None)¶
Sort an array, in-place.
| Parameters: | axis : int, optional Axis along which to sort. Default is -1, which means sort along the last axis. kind : {‘quicksort’, ‘mergesort’, ‘heapsort’}, optional Sorting algorithm. Default is ‘quicksort’. order : str or list of str, optional When a is an array with fields defined, this argument specifies which fields to compare first, second, etc. A single field can be specified as a string, and not all fields need be specified, but unspecified fields will still be used, in the order in which they come up in the dtype, to break ties. |
|---|
Notes
See sort for notes on the different sorting algorithms.
Examples
a = np.array([[1,4], [3,1]]) a.sort(axis=1) a array([[1, 4], [1, 3]]) a.sort(axis=0) a array([[1, 3], [1, 4]])
Use the order keyword to specify a field to use when sorting a structured array:
a = np.array([('a', 2), ('c', 1)], dtype=[('x', 'S1'), ('y', int)]) a.sort(order='y') a array([('c', 1), ('a', 2)], dtype=[('x', '|S1'), ('y', '<i4')])