[R] newby question

[Martin Morgan]

Hi Paul --

Paul Evans wrote:
> Hi,
> 
> I work with bio-conductor, but this is probably a basic R question.
> 
> I want to emulate the GOBPOFFSPRING$"GO:0008150" command:
> 
> 
>> allBP <- GOBPOFFSPRING$"GO:0008150"
>> class(allBP)
> [1] "character"
>> length(allBP)
> [1] 16066
> 
> I want to create a function so that I can execute the command by passing as a parameter the portion in quotes in the above command (""GO:0008150"). So my current function looks like:
> 
>> str <- "GO:0008150"
>> ifunc <- function(str){
> + allBP <- paste('GOBPOFFSPRING$',str,sep='')
> + return(allBP)
> + }
>> x <- ifunc(str)
>> class(x)
> [1] "character"
>> length(x)
> [1] 1
> 
> But this just returns a string. How do I get the command to execute?

use GOBPOFFSPRING[[str]]. It is in some ways a general R question, but
actually GOBPOFFSPRING is an instance of a class with specialized
functionality, and you'll better advice about it on the Bioconductor
mailing list.

Martin

> 
> thanks!
> 
> 
>       
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> 
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