[R] "nonstandard" column names

Moshe Olshansky m_olshansky at yahoo.com
Tue Jan 22 02:56:05 CET 2008

Thanks to all those who responded!

Now the obvious thing (putting the column name into
double quotes) works for me too. But it didn't work
yesterday! I have no explanation for this. 


--- Moshe Olshansky <m_olshansky at yahoo.com> wrote:

> Hi everyone,
> I am sure that this question has been asked here
> some
> time ago but I do not remember the answer and was
> unable to find it in the archives...
> Below is my question: suppose that I have a
> data.frame
> x and one of it's columns name is "CPI/RPI" (without
> quotation marks of course). How can I reference this
> column? Neither of x$CPI/RPI or x$"CPI/RPI" work. I
> certainly can do x[,which(colnames(x) == "CPI/RPI")]
> but there should be a nicer way to do this.
> Thank you!
> Moshe Olshansky.
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