One-hot

Decimal Binary Unary One-hot
0 000 00000000 00000001
1 001 00000001 00000010
2 010 00000011 00000100
3 011 00000111 00001000
4 100 00001111 00010000
5 101 00011111 00100000
6 110 00111111 01000000
7 111 01111111 10000000

In digital circuits and machine learning, a one-hot is a group of bits among which the legal combinations of values are only those with a single high (1) bit and all the others low (0). A similar implementation in which all bits are '1' except one '0' is sometimes called one-cold. In statistics, dummy variables represent a similar technique for representing categorical data.

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