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Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>
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@ -128,6 +128,32 @@ Output:
(array([0, 1, 1, 1]), array([2, 0, 1, 2]))
```
For reversing it, you can use this:
```python
import numpy as np
a = np.arange(0, 6).reshape((2, 3))
a = (a > 1)
print(a)
idx = np.nonzero(a)
print()
b = np.zeros((2, 3), dtype=bool)
b[idx] = True
print(b)
```
Output:
```python
[[False False True]
[ True True True]]
[[False False True]
[ True True True]]
```
## [Logic functions](https://numpy.org/doc/stable/reference/routines.logic.html)
### [Truth value testing](https://numpy.org/doc/stable/reference/routines.logic.html#truth-value-testing)