Spencer Jones a écrit : > I have an array with 44800 columns and 24 rows I would like to compute the > row average for the array 100 columns at a time, so I would like to end up > with an array of 24 rows x 448 columns. I have tried using apply(dataset, 1, > function(x) mean(x[])), but I am not sure how to get it to take the average > 100 columns at a time. Any ideas would be welcomed. > thanks, > Spencer
?rowSums, ?rowMeans something like : rowMeans(my_array[,1:100]) (perhaps you'll have to use t() also) hih ______________________________________________ R-help@stat.math.ethz.ch 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.
