Opinions on softmax function

  About softmax function , Its essence is sigimoid The extension of function . Transform a two classification problem into a multi classification problem .

softmax The result of the function is a probability value , The greater the probability , The more likely it is to be classified as .

In the following illustration ,e The approximate value of is 2.718, Through simple exponential calculation , The intermediate value can be obtained ; Then normalize the intermediate value , You can get the probability value , That is, the result of classification .

  here , We also show the exponential function image of high school mathematics .

Obviously , Its value is non negative . After normalization , Its probability is the sum of 1.