Internal glmnet functions
fix.lam(lam)
lambda.interp(lambda,s)
nonzeroCoef(beta, bystep=FALSE)
glmnet_softmax(x)These are not intended for use by users. lambda.interp
does linear interpolation of the lambdas to obtain a prediction at a
new point s. glmnet_softmax does the classification for multinomial models.
nonzeroCoef determines in an efficient manner which variables
are nonzero in each fit. jerr prints out error messages from
the fortran. plotCoef is called by the plot method for
glmnet objects.