I have an array, one say ar, with 3 dimensions. dim(ar)
>200 3 4
I would like to calculate the mean on the third dimension. mean(ar[1,1,]),mean(ar[1,2,]) etc..., mean[200,3,]. How can i do this ?
apply(ar,c(1,2),mean) will produce a (200 X 3) matrix of means averaged over the third dimension. J.R. Lockwood 412-683-2300 x4941 lockwood at rand.org http://www.rand.org/methodology/stat/members/lockwood/ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._