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...d.csv("bbb.csv") # reading data from one csv file abc1<-mean(subset(abc,Group=="A")) hear i have to creat a .csv file and in that i have to create column's with names *group, mean* and farther i have to caliculate for Groups:-A, B, C, D, F and i have to append data to consicutive rows of groups can any one suggest how can i farward in this issue thanks in advance [[alternative HTML version deleted]]

Hi all, I read data from *.xls file and i did some caliculations on that data and now i have to create a column in the same .xls file and i have to insert the data in to the consicutive rows related to the previous data i tried it with *write.xls() *but the thing is it deleted all the columns previously presented in that file and it created a column and inserted data can any one suggest what to do for this thanks in advance [[alternative HTML version deleted]]