[R] "object not found" within function

[Uwe Ligges]

Thushyanthan Baskaran wrote:
> Hi,
> 
> I am trying to write a function to compute many cross-tabulations with 
> the -svytable- command. Here is a simplified example of the structure of 
> my code (adapted from the -svytable- help file):
> 
> 
> 
> data(api)
> func.example<-function(variable){ dclus1<-svydesign(id=~1, 
> weights=~pw,data=apiclus1, fpc=~fpc)
> 
> svytable(~ variable, dclus1)
> 
> }
>   When I call this function with:
> 
> func.example(api99)


What are api, api99, svytable, svydesign etc?


Uwe Ligges




> I get the following error:
> 
> 
> Error in eval(expr, envir, enclos) : object 'variable' not found.
> (Everything works fine when I type svytable(~ api99, dclus1).)
> 
> I guess that the problem has something to do with function environments, 
> but since I am new to R, I can't seem to figure out how to rectify the 
> code.
> I am running R version 2.10 on Windows Vista.
> Thanks for the help!
> 
> Thushyanthan
> 
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