logit-n-probit

logistic VS logit

先上两幅logistic和logit的图

• logistic function
  sigmoid(x) = 1/(1+e^-x)

  

• logit function
  logit(x) = log(x/1-x)

  

• logit和logistic的关系
  logit和logistic互为反函数，如下：