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flat
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* TOC {:toc}Top
Questions to David Rotermund
numpy.ndarray.flat
ndarray.flat
A 1-D iterator over the array.
This is a numpy.flatiter instance, which acts similarly to, but is not a subclass of, Python’s built-in iterator object.
import numpy as np
a = np.arange(0, 12).reshape((4, 3))
c = np.zeros_like(a)
print(a)
print()
for i in range(0, c.size):
c.flat[i] = a.flat[i] ** 2
print(c)
Output:
[[ 0 1 2]
[ 3 4 5]
[ 6 7 8]
[ 9 10 11]]
[[ 0 1 4]
[ 9 16 25]
[ 36 49 64]
[ 81 100 121]]
Reminder: size vs shape
numpy.ndarray.size
ndarray.size
Number of elements in the array.
Equal to np.prod(a.shape), i.e., the product of the array’s dimensions.
ndarray.shape
ndarray.shape
Tuple of array dimensions.