Also known as: Log odds
Log-odds — логарифм шансов наступления события, где шансы равны вероятности успеха, деленной на вероятность неудачи. В статистике и машинном обучении log-odds дает линейную шкалу для моделирования вероятностей и является обратным преобразованием логистической sigmoid function.
The logarithm of the odds of some event. If the event is a binary probability, then odds refers to the ratio of the probability of success (p) to the probability of failure (1-p). For example, suppose that a given event has a 90% probability of success and a 10% probability of failure. In this case, odds is calculated as follows: The log-odds is simply the logarithm of the odds. By convention, "logarithm" refers to natural logarithm, but logarithm could actually be any base greater than 1. Sticking to convention, the log-odds of our example is therefore: The log-odds function is the inverse of the sigmoid function.