R help - Jan 2010 - Sweave - How to use local objects in code chunks

Hello,

I wrote a function create_report that calls the function Sweave.
create_report shall be used to create a pdf-report about an lm-Object which
is passed as an argument to create_report.

I try to use an object sel_model, that is created within the function
environment of create_report and later on used within the first code chunk
of the file report_template.rnw.

When I use following code I get an error message that the object sel_model
could not been found. How can I achieve to use objects within code-chunks
that are not globally available, but only within my function call of
create_report? Is it only possible to use globally available objects within
a code chunk?

 

create_report<-function(model_lst){

#define parameters

sel_model<-model_lst

Sweave(''report_template.rnw'')

tools::texi2dvi("report_template.tex", pdf=TRUE)

}

 

create_report(p3)

 

 

this is the file report_template.rnw

 

\documentclass[a4paper]{article}

\begin{document}

 

<<echo=FALSE>>
summary(sel_model)

@

\begin{center}

<<fig=TRUE,echo=FALSE>>
plot_fx(sel_model)

@

\end{center}

 

\end{document}

 


	[[alternative HTML version deleted]]

I don't think it works that way. The .Rnw file should be
self-contained. Put all the R code in the .Rnw file (or keep it in a
separate file and source() it into the .Rnw file).

-Ista



On Sat, Jan 16, 2010 at 3:35 PM, Jan-Henrik P?tter
<henrik.poetter at gmx.de> wrote:
> Hello,
>
> I wrote a function create_report that calls the function Sweave.
> create_report shall be used to create a pdf-report about an lm-Object which
> is passed as an argument to create_report.
>
> I try to use an object sel_model, that is created within the function
> environment of create_report and later on used within the first code chunk
> of the file report_template.rnw.
>
> When I use following code I get an error message that the object sel_model
> could not been found. How can I achieve to use objects within code-chunks
> that are not globally available, but only within my function call of
> create_report? Is it only possible to use globally available objects within
> a code chunk?
>
>
>
> create_report<-function(model_lst){
>
> #define parameters
>
> sel_model<-model_lst
>
> Sweave('report_template.rnw')
>
> tools::texi2dvi("report_template.tex", pdf=TRUE)
>
> }
>
>
>
> create_report(p3)
>
>
>
>
>
> this is the file report_template.rnw
>
>
>
> \documentclass[a4paper]{article}
>
> \begin{document}
>
>
>
> <<echo=FALSE>>>
> summary(sel_model)
>
> @
>
> \begin{center}
>
> <<fig=TRUE,echo=FALSE>>>
> plot_fx(sel_model)
>
> @
>
> \end{center}
>
>
>
> \end{document}
>
>
>
>
> ? ? ? ?[[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org