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Hi, how can I treat data organised in classes and frequencies? Ex. class frequency 20-23 9 23-25 7 26-28 5 29-31 5 32-34 3 Thanks Angelo Scozzarella

...A) } else { levels(x)[me] } } else if(class(x)=="histogram"){ N<-sum(x$counts) cl<-min(which(cumsum(x$counts)>=N/2)) return(x$breaks[cl]+ (N/2-sum(x$counts[1:(cl-1)]))/(x$densit[cl]*N) } else median(x) } thanks Angelo Scozzarella

Hi, How can I make an ANOVA if I haven't got all data set but I know the numbers of subjects for each group, the mean and di standard deviation for each group? Thanks Angelo Scozzarella

Hi, I want to calculate the T-Test from means and sd. How can I do it? Thanks Angelo Scozzarella

Hi, I want to sort a matrix by a specific variable without changing the row binding between variables. Ex. Name Sex Age Fred M 24 John M 18 Mary F 21 ordered by Age Name Sex Age John M 18 Mary F 21 Fred M 24 Thanks Angelo

Dear R friends, I'd like to generate random sample (variable size and range) without a specified distribution but with given mean and standard deviation. Could you help me? thanks in advance Angelo

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