numpy.ndarray.setfield — NumPy v2.2 Manual (original) (raw)

method

ndarray.setfield(val, dtype, offset=0)#

Put a value into a specified place in a field defined by a data-type.

Place val into _a_’s field defined by dtype and beginning _offset_bytes into the field.

Parameters:

valobject

Value to be placed in field.

dtypedtype object

Data-type of the field in which to place val.

offsetint, optional

The number of bytes into the field at which to place val.

Returns:

None

Examples

import numpy as np x = np.eye(3) x.getfield(np.float64) array([[1., 0., 0.], [0., 1., 0.], [0., 0., 1.]]) x.setfield(3, np.int32) x.getfield(np.int32) array([[3, 3, 3], [3, 3, 3], [3, 3, 3]], dtype=int32) x array([[1.0e+000, 1.5e-323, 1.5e-323], [1.5e-323, 1.0e+000, 1.5e-323], [1.5e-323, 1.5e-323, 1.0e+000]]) x.setfield(np.eye(3), np.int32) x array([[1., 0., 0.], [0., 1., 0.], [0., 0., 1.]])