[R] simple question about variables....

[Stéphane Cruveiller]

Thx for the tip....


Stéphane.

Jacques VESLOT a écrit :
> 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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