Hi,all a quick question A larger file include many"." (stands for missing value) for variable, say, x. after read in the file and assign it another name such as :
x1<-data$x but x1 is always a facotor but not numerical. so How can I get a numeric vector from the read in data frame. how can I replace those "." with "NA" to perform analysis. thank you very much best regards ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
