On 04/24/2010 05:48 AM, Maxim wrote:
Hi,I have a very simple question, but I'm obviously not able to solve the problem on my own. I have a data.frame like sample(c("A","B","C"),size=20,replace = T)->type rnorm(20)->value data.frame(ty=type,val=value)->test There must be some built in functions, that will do some descriptive statistics with tabular output, in the end I like to have something like number of samples mean sd ............. A 5 B 9 C 6 So I need a function that counts the number of occurrences of factors in type and then does something like the *summary* function, but factor specific. I tried: vector()->Median vector()->SD vector()->Mean as.data.frame(table(type))->int for (count in c(1:(nrow(int)))) { subset(test, ty==as.character(int$type[count])) -> subtest median(subtest$val)->Median[count] sd(subtest$val)->SD[count] mean(subtest$val)->Mean[count] } cbind(int,Median,SD,Mean) This works, but: isn't this much too complicated, I bet there is such functionality embedded in the base packages, but I cannot find it.
Hi Maxim, Look at: describe (psych) describe (Hmisc) describe (prettyR) and you will probably find something useful. Jim ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
