I am teaching a summercourse this and the next week where the students are using R.



We have downloaded and use the new version R.3.0. It has worked perfectly until today where some of the basic functions have started NOT to work.



Examples are sd() and lm ()



The message we get is Error: could not find function "lm" or Error: could not find function "sd"



Have you ever encountered that. If yes what can I do about it. Is it a basic error in the new R version? I have used R for teaching in 5 years now and hae ever encountered a problem like that??



Thanks, Sinne


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