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

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