For matrices, colMeans/rowMeans are quick, vectorized functions. But say I have a higher dimensional array:
moo <- array(runif(400*9*3),dim=c(400,9,3)) And I want to get the mean along the 2nd dimension. I can, of course, use apply: moo1 <- apply(moo,c(1,3),mean) But this is not a vectorized operation (so it doesn't execute as quickly). How would one vectorize this operation (if possible)? Is there an array equivalent of colMeans/rowMeans? --j -- Jonathan A. Greenberg, PhD Assistant Professor Global Environmental Analysis and Remote Sensing (GEARS) Laboratory Department of Geography and Geographic Information Science University of Illinois at Urbana-Champaign 607 South Mathews Avenue, MC 150 Urbana, IL 61801 Phone: 217-300-1924 http://www.geog.illinois.edu/~jgrn/ AIM: jgrn307, MSN: jgrn...@hotmail.com, Gchat: jgrn307, Skype: jgrn3007 ______________________________________________ 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.