Hi list, I have a 1710x244 matrix of numerical values and I would like to calculate the mean of every group of three consecutive values per column to obtain a new matrix of 570x244. I could get it done using a for loop but how can I do that using apply functions? In addition to this, do I have to initizalize a 570x244 matrix with 0's to store the calculated values or can the output matrix be generated while calculating the mean values?
Cheers, Dave [[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.