see ?"$"
'x$name' is equivalent to 'x[["name"]]'
so you need use :
eval(parse(text = paste("OBJ$", varname)))
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CNRS UMR 8090
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Stéphane Cruveiller a écrit :
> Dear R users,
>
> I have a simple question on variable manipulation.
> Imagine I have an object "OBJ" that has "toto" as one of its variables.
> I would like to understand why if I do
>
> > varname <- "toto"
>
> >OBJ$varname returns no results
>
> whereas
>
> > OBJ[varname] returns the column entitled
> "toto"
>
>
> Thanks for your help.
>
> Stéphane.
>
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