Update README.md
Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>
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@ -18,6 +18,35 @@ numpy.ravel_multi_index(multi_index, dims, mode='raise', order='C')
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> Converts a tuple of index arrays into an array of flat indices, applying boundary modes to the multi-index.
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```python
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import numpy as np
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idx = np.ravel_multi_index(([0, 1, 2], [0, 1, 1]), dims=(3, 2))
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print(idx) # -> [0 3 5]
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a = np.zeros((3, 2))
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a.flat[idx] = 1
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print(a)
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print()
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a = np.zeros((3, 2))
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a.flat[idx] = np.arange(1, idx.shape[0] + 1)
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print(a)
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```
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Output:
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```python
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[[1. 0.]
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[0. 1.]
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[0. 1.]]
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[[1. 0.]
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[0. 2.]
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[0. 3.]]
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```
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## [numpy.unravel_index](https://numpy.org/doc/stable/reference/generated/numpy.unravel_index.html)
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```python
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