numpy.matrix.fill — NumPy v2.2 Manual (original) (raw)

method

matrix.fill(value)#

Fill the array with a scalar value.

Parameters:

valuescalar

All elements of a will be assigned this value.

Examples

import numpy as np a = np.array([1, 2]) a.fill(0) a array([0, 0]) a = np.empty(2) a.fill(1) a array([1., 1.])

Fill expects a scalar value and always behaves the same as assigning to a single array element. The following is a rare example where this distinction is important:

a = np.array([None, None], dtype=object) a[0] = np.array(3) a array([array(3), None], dtype=object) a.fill(np.array(3)) a array([array(3), array(3)], dtype=object)

Where other forms of assignments will unpack the array being assigned:

a[...] = np.array(3) a array([3, 3], dtype=object)