# incorporate R code into latex paragraph

I have a large R script I am trying to source in a LaTex document and then reference output from specific dataframes created in the source code in text in a LaTex paragraph.

A small example:

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}

\begin{document}
You can type R commands in your \LaTeX{} document and they will be properly run and the output printed in the document.

<<>>=
opts_chunk$set(echo=F,message=F, warnings=F) #need com_dredge, table 2.1 and num_stations from this source code source(file="S:/Adv/Scallop Central/2018 Scallop RSA/Industry Report/Industry Report.R") #num_stations dataframe needed for text below num_stations @ This is a value$\Sexpr{num_stations$Number}$.

\end{document}


When I run the code chunk I dont think the source line is working. I have read a couple different options: 1. The source file needs to be in the same folder as the knitr file. I tried this an got the error message cannot open the connection. 2. Type out the path in the source code.
I also tried that and got the same message. 3. Use

  opts_knit$set(root.dir = '/Users/username/path_to_project').  I also tried this in the code chunk in the latex file and got the same message. I would appreciate any help. • Are you looking for verbatim environment? – Sigur Feb 13 '19 at 21:09 • I'm guessing this isn't the problem, but spaces in path names are occasionally problematic. Could you try a directory without any spaces? Could you also add a minimal R file that reproduces the problem? – Teepeemm Feb 13 '19 at 21:21 • I wasnt sure how to provide a R file that reproduces the example because its a source file. Do you have any suggestions? I did try a directory with no spaces and didnt have any luck. – user41509 Feb 14 '19 at 14:23 ## 1 Answer foo.R (in the working directory): # ---- test ---- bah <- data.frame(a=c(1,2,3),b=c(4,5,6))  test.Rnw (in the same working directory): \documentclass{article} \usepackage{booktabs} \begin{document} <<mychuck, cache=F,echo=F>>= read_chunk('foo.R') @ <<test,echo=F>>= @ <<mydata,result="asis",echo=F>>= kable(bah, caption="my data", booktabs = TRUE) @ The variable \verb|bah$a| is \Sexpr{combine_words(bah$a)}. \end{document}  To compile the above file use Rstudio or see How to build Knitr document from the command line. • When I run your example I get the following errors: Line 5 Missing$ inserted, Line 12 Missing $inserted and the PDF doesnt compile. Also, my question was related to getting values from a dataframe into test using$\Sexpr{num_stations$Number}$. – user41509 Feb 14 '19 at 14:34
• @user41509 Sorry, I wrote wrongly test.tex instead of test.Rnw, but it should be a obvious mistake if you are used to compile knitr files. If not, I suggest use Rstudio. Once you loaded the chunk of the external script is irrelevant if you call the whole data frame in a table of another chunk or only a variable in a \Sexpr{}. It should work anyway. See my updated answer. – Fran Feb 14 '19 at 17:44
• Thank you - I was able to get my source code to work with my document. This is my first time using Latex so am not familiar with the different ways to compile files. I am using R studio. – user41509 Mar 1 '19 at 16:28