Hi Dmitry, You might try
with(MyDataFrame[, 1:3]) is variable1, variable2 and variable3 correspond to the first three columns of your data, or with( MyDataFrame( cor( cbind( variable1, variable2, variable3) ) ) ) otherwise. HTH, Jorge On Thu, Apr 7, 2011 at 3:09 PM, Dmitry Berman <> wrote: > Listers, > > I have a question regarding correlation matrices. It is fairly straight > forward to build a correlation matrix of an entire data frame. I simply use > the command cor(MyDataFrame). However, what I would like to do is construct > a smaller correlation matrix using just three of the variable out of my > data > set. > > When I run this: > cor(MyDataFrame$variable1, MyDataFrame$variable2,MyDataFrame$variable3) I > get an error. > > Is there a way to do this through a built in function or is this something > I > have to construct manually? > > Thanks > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.
