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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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numpy/dimensions/README.md
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@ -123,3 +123,19 @@ print(type(data[0:1, 0:1, 0:1])) # -> <class 'numpy.ndarray'>
**Please understand this creates a view which is connected to original data.** If necessary make a **copy()**.
## Adding dimensions with np.newaxis
```python
import numpy as np
data = np.zeros((2))
print(data.shape) # -> (2,)
print(data[:, np.newaxis].shape) # -> (2, 1)
print(data[np.newaxis, :].shape) # -> (1, 2)
print(data[:, np.newaxis, np.newaxis].shape) # -> (2, 1, 1)
print(data[np.newaxis, :, np.newaxis].shape) # -> (1, 2, 1)
print(data[:, np.newaxis, np.newaxis].shape) # -> (2, 1, 1)
```