New Post

content/blog/reverseonehotencode.md

@@ -0,0 +1,22 @@
+---
+title: "Reverse One-Hot Encode"
+date: 2020-10-11T21:58:47-04:00
+draft: false
+tags: []
+---
+
+Let's say that you have a dataset that is one hot encoded like the following observation:
+
+```python
+import numpy as np
+obs = np.array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
+       0, 0, 0, 0])
+```
+
+The easiest way to reverse one-hot encode the structure, is to take the `argmax` of the observation.
+
+```python
+reverse_encoding = np.argmax(obs)
+# 13
+```
+