Hi R-helpers, I have been struggling with calculating row and column statistics, e.g. standard deviation.
I know that > datac$Mean<-rowMeans(datac,na.rm=TRUE) will give me row means. I have tried to replicate those row means with the apply function: > datac$Mean2<-apply(datac,2,mean) so that I can replace the function argument with "sd" (instead of mean) to get standard deviations. But, I'm running into this error: > dim(datac) [1] 17 271 > datac$Mean2<-apply(datac,2,mean) Error in dimnames(x) <- dn : length of 'dimnames' [2] not equal to array extent Can anyone see what I'm doing wrong? Thanks! Mark Na ______________________________________________ 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.
