See: ?rowSums
On 2/20/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > I have a dataframe called "data" with 5 records (in rows) each of > which has been scored on each of many variables (in columns). > > Five of the variables are named var1, var2, var3, var4, var5 using > headers. The other variables are named using other conventions. > > I can create a new variable called var6 with the value 15 for each > record with this code: > > > var6=var1+var2+var3+var4+var5 > > but this is tedious for my real dataset with dozens of variables. I > would rather use a wildcard to add up all the variables that begin > with "Var" like this pseudocode: > > > Var6=sum(var*) > > Any suggestions for implementing this in R? Thanks! Mark > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html