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Hi, The "penalized" documentation says that "Unordered factors are turned into as many dummy variables as the factor has levels". This is done by a function in the package called contr.none. I'm trying to figure out how exactly is a model matrix created with this contrast option when the user calls the function with a formula. I typed "library(penalized) ;

I was wondering if there''s a way to limit what a user is typing on the keyboard to only valid numeric input. Is there a simple plugin or something which would allow this? I guess with AJAX it could also be one. Has anyone already solved this requirement? Thanks in advance. James -------------- next part -------------- An HTML attachment was scrubbed... URL: