[R] simple question about variables....

[Jacques VESLOT]

see ?"$"
'x$name' is equivalent to 'x[["name"]]'

so you need use :
eval(parse(text = paste("OBJ$", varname)))

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Jacques VESLOT

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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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