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One-hot
open-in-new
<table><tbody><tr><th><a href="/facts/Decimal/7omfVNIM">Decimal</a></th><th><a href="/facts/Binary_number/a6JDSRPs">Binary</a></th><th><a href="/facts/Unary_numeral_system/J37tMmyW">Unary</a></th><th>One-hot</th></tr><tr><td>0</td><td>000</td><td>00000000</td><td>00000001</td></tr><tr><td>1</td><td>001</td><td>00000001</td><td>00000010</td></tr><tr><td>2</td><td>010</td><td>00000011</td><td>00000100</td></tr><tr><td>3</td><td>011</td><td>00000111</td><td>00001000</td></tr><tr><td>4</td><td>100</td><td>00001111</td><td>00010000</td></tr><tr><td>5</td><td>101</td><td>00011111</td><td>00100000</td></tr><tr><td>6</td><td>110</td><td>00111111</td><td>01000000</td></tr><tr><td>7</td><td>111</td><td>01111111</td><td>10000000</td></tr></tbody></table> <p>In <a href="/facts/Digital_circuits/3kJcKbkw">digital circuits</a> and <a href="/facts/Machine_learning/e0w0XJTu">machine learning</a>, a one-hot is a group of <a href="/facts/Bit/S972NSaD">bits</a> 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 <a href="/facts/Statistics/DNPsKGYU">statistics</a>, <a href="/facts/Dummy_variable_(statistics)/LbT5Wcjm">dummy variables</a> represent a similar technique for representing <a href="/facts/Categorical_data/3UQNkLqs">categorical data</a>. </p>