The logistic probability density function
Parameters : | X : array-like
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Returns : | np.exp(-x)/(1+np.exp(-X))**2 : |
Notes
In the logit model,
\lambda\left(x^{\prime}\beta\right)=\frac{e^{-x^{\prime}\beta}}{\left(1+e^{-x^{\prime}\beta}\right)^{2}}