Logistic regression with package rms in R

The rms package by Frank E Harrell Jr provides a useful function lrm to apply logistic regression. Moreover, this function also provides many useful statistics, and a gooeness-of-fit test (le Cessie and Houwelingen test) could be applied by using the function residuals(a lrm model, "gof"). Read the official document of package rms for more details.

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