# Log odds > The logarithm of the odds of some event. By convention, "logarithm" refers to natural logarithm, but logarithm could actually be any base greater than 1.[^1] The logarithm of the [odds](https://wiki.g15e.com/pages/Odds%20(statistics.txt)) of some event. By convention, "logarithm" refers to , but logarithm could actually be any base greater than 1.[^1] The log-odds function is the inverse of the [sigmoid function](https://wiki.g15e.com/pages/Sigmoid%20function.txt) ## Footnotes [^1]: https://developers.google.com/machine-learning/glossary#log-odds