Table 1.

Main publicly available R packages that solves the Lasso and other sparse penalties for the Cox, logistic or conditional logistic models (surveyed October 1st, 2014).

Package	1:1 matching?	1:M matching?	Amenable to processing of with grouping penalties	with large N	K:M matching?
Logistic Model
glmpath [42]	NO	NO	NO	NO	NO
penalized [49]	YES	NO	NO	NO	NO
glmnet [24]	NO	NO	NO	NO	NO
Cox Model
glmpath [42]	NO	NO	NO	NO	NO
penalized [49]	YES	YES	NO	NO	NO
glmnet [50]	NO	NO	NO	NO	NO
Conditional Logistic
pclogit [21]	YES	YES	YES	NO	NO
clogitL1 [23]	YES	YES	NO	NO	YES
clogitLasso [43,51]	YES	YES	NO	YES	NO