compute variance of every column in a matrix without a loop
On 03/16/02 19:43, Francisco J Molina wrote:
Is it possible to compute the variance of every column in a matrix without a loop?
If the matrix is m1, apply(m1,2,var) or, with missing data, apply(m1,2,var,na.rm=T) In general, apply() and related functions are well worth understanding.
Jonathan Baron, Professor of Psychology, University of Pennsylvania Home page: http://www.sas.upenn.edu/~baron -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- 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 _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._