Dear All, I have a function that it works in all of data. dim(data) 24(sample) 2600(variable) data
[1] [2] [3] [4] ... [2600] [1] 10.73140 9.89450 9.12233 8.33994 9.43412 [2] 10.58010 10.02023 8.69257 8.46640 9.05038 [3] 10.80644 9.59991 8.71311 8.64168 9.08396 [4] 10.85874 9.16161 9.27786 9.10818 9.70617 [5] 10.89607 10.02847 8.81274 8.77573 9.12501 ... [24] 10.71652 9.71979 9.23088 8.87465 9.49099 Now I want that the function works on 100 subgroups of data. I determined this subgroups by subgroup matrix dim(subgroup) 100(subgroup) 2600(variable) Subgroup [1] [2] [3] [4]... [2600] [1] 1 0 0 0 0 [2] 1 0 0 0 0 [3] 1 0 0 0 0 [4] 0 1 0 0 0 [5] 0 0 1 0 0 ... [100] 0 0 1 0 0 the elements of subgroup are 1 ( show us the variable belongs the subgroup) or 0 (show us the variable does not belong the subgroup) result <- apply(subgroup , 1, function(z) func_LL(data[which(z==1),])) but I saw this error Error in ncol(data) : subscript out of bounds while our dimensions are correct, I think:( Thanks a lot for your guide. Best Regards, Soheila [[alternative HTML version deleted]] ______________________________________________ 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.