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Update README.md

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Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>
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@ -156,7 +156,7 @@ Output:
[ 6 17 8]]
```
## [numpy.place](https://numpy.org/doc/stable/reference/generated/numpy.place.html) and [numpy.extract](https://numpy.org/doc/stable/reference/generated/numpy.extract.html) and [numpy.copyto](https://numpy.org/doc/stable/reference/generated/numpy.copyto.html)
## [numpy.place](https://numpy.org/doc/stable/reference/generated/numpy.place.html)
```python
numpy.place(arr, mask, vals)
@ -168,6 +168,37 @@ numpy.place(arr, mask, vals)
>
> Note that extract does the exact opposite of place.
```python
import numpy as np
a = np.arange(1, 10).reshape((3, 3))
print(a)
print()
np.place(a, a >= 7, 99)
print(a)
print()
np.place(a, a >= 7, [70, 71, 72, 73])
print(a)
print()
```
Output:
```python
[[1 2 3]
[4 5 6]
[7 8 9]]
[[ 1 2 3]
[ 4 5 6]
[99 99 99]]
[[ 1 2 3]
[ 4 5 6]
[70 71 72]]
```
## [numpy.extract](https://numpy.org/doc/stable/reference/generated/numpy.extract.html)
```python
numpy.extract(condition, arr)
@ -179,6 +210,27 @@ numpy.extract(condition, arr)
>
> Note that place does the exact opposite of extract.
```python
import numpy as np
a = np.arange(1, 10).reshape((3, 3))
print(a)
print()
b = np.extract(a >= 7, a)
print(b)
```
Output:
```python
[[1 2 3]
[4 5 6]
[7 8 9]]
[7 8 9]
```
## [numpy.copyto](https://numpy.org/doc/stable/reference/generated/numpy.copyto.html)
```python
numpy.copyto(dst, src, casting='same_kind', where=True)
@ -188,4 +240,26 @@ numpy.copyto(dst, src, casting='same_kind', where=True)
>
> Raises a TypeError if the casting rule is violated, and if where is provided, it selects which elements to copy.
```python
import numpy as np
a = np.arange(1, 10).reshape((3, 3))
b = np.zeros_like(a)
print(a)
print()
np.copyto(b, a, where=(a >= 7))
print(b)
```
Output:
```python
[[1 2 3]
[4 5 6]
[7 8 9]]
[[0 0 0]
[0 0 0]
[7 8 9]]
```