The logistic cumulative distribution function
Parameters : | X : array-like
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Returns : | 1/(1 + exp(-X)) : |
Notes
In the logit model,
\Lambda\left(x^{\prime}\beta\right)=\text{Prob}\left(Y=1|x\right)=\frac{e^{x^{\prime}\beta}}{1+e^{x^{\prime}\beta}}