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This solution is a bit less verbose. It leaves the text that should always be printed outside the chunk (to avoid confusion), and creates a string inside the chunk that can be conditionally printed using \Sexpr{} in the text. \documentclass{article} \begin{document} <<>>= if(rnorm(1) > 0) x = rbinom(1, 100, 0.5) else x = 0 big_number = ...


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I can't explain why it is working now, but here is what I found I should use in the preambel: \usepackage{lmodern} \usepackage[T1]{fontenc} Found this in another thread (not really related to my question), but now I get what I want in the R output (no changes required in the R.script) as well as in the pdf.


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Revision based on your clarification. The problem you are having is that \Sexpr cannot be nested because of how R evaluates and how LaTeX evaluates. But I have implemented what I think you want. Based upon your revision, the conditional must be all done inside of R, as follows: \documentclass{article} \begin{document} <<echo=FALSE, ...


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Compile your original Tikz pictures using the standalone document class. Then in your main file, add \usepackage{standalone} and then write \input{<tikzpicture name>.tex}; assuming they are located in the same folder, you won't need a path. If you want it to appear where you have included it, then enclose it in a figure environment like: ...


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Got the answer. Installed the basic installation. Then found the setup file in the path 'C:/Users/User_name/temp/MikTex/***.exe'. Installed it. Then went to RStudio software, tools>global options>Sweave. Changed the 'Typset LaTeX into PDF using:' to pdfLaTeX. Ran the knit PDF command for a R Markdown file and it asked for the installation of the ...



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