options() not respected in child documents

[cmmp]

I'm trying to control the number of digits for inline tex output. While this works if the options(digits = x) is set in the same document as the code, if it's set on the parent it is ignored.

Here's a simple example:

sample.Rnw:

\documentclass[a4paper]{article}

\begin{document}

<<setup>>=
options(digits = 2)
@ 

\title{Test}

\section{Test}
Calling child:
\Sexpr{knit_child('child.Rnw')}


\end{document}

child.Rnw:

<<>>=
x = 1.2109382103921
@

Just a test, $x = \Sexpr{x}$.

Makefile:

all:
        R -e "require(knitr); knit('sample.Rnw')"
        pdflatex sample.tex

output of child.tex:

\begin{knitrout}
\definecolor{shadecolor}{rgb}{0.969, 0.969, 0.969}\color{fgcolor}\begin{kframe}
\begin{alltt}
x = 1.2109382103921
\end{alltt}
\end{kframe}
\end{knitrout}


Just a test, $x = 1.2109$.

if options(digits=2) is set on child.Rnw, then the output is correct:

correct-child.tex:

\begin{knitrout}
\definecolor{shadecolor}{rgb}{0.969, 0.969, 0.969}\color{fgcolor}\begin{kframe}
\begin{alltt}
x = 1.2109382103921
\hlfunctioncall{options}(digits = 2)
\end{alltt}
\end{kframe}
\end{knitrout}


Just a test, $x = 1.21$.

relevant info:

> require(knitr)
Loading required package: knitr
> sessionInfo()
R version 2.15.1 (2012-06-22)
Platform: x86_64-unknown-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_US.ISO-8859-1       LC_NUMERIC=C                   
 [3] LC_TIME=en_US.ISO-8859-1        LC_COLLATE=en_US.ISO-8859-1    
 [5] LC_MONETARY=en_US.ISO-8859-1    LC_MESSAGES=en_US.ISO-8859-1   
 [7] LC_PAPER=C                      LC_NAME=C                      
 [9] LC_ADDRESS=C                    LC_TELEPHONE=C                 
[11] LC_MEASUREMENT=en_US.ISO-8859-1 LC_IDENTIFICATION=C            

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] knitr_0.6.8

loaded via a namespace (and not attached):
[1] digest_0.5.2   evaluate_0.4.2 formatR_0.5    plyr_1.7.1     stringr_0.6   
[6] tools_2.15.1  

Expected behavior: I believe that if an option is set at the parent document, I shouldn't have to repeat it at every child... following DRY.

Thanks for the hard work on this package!

[yihui]

That is easy to fix; will do it this evening. Thanks for the detailed report!

[yihui]

The fix for this issue is to move lines 176-182 before line 117 in https://github.com/yihui/knitr/blob/master/R/output.R#L117

[github-actions]

This old thread has been automatically locked. If you think you have found something related to this, please open a new issue by following the issue guide (https://yihui.org/issue/), and link to this old issue if necessary.