Centering image and text in R Markdown for a PDF report

Question

I want to center an image and or text using R Markdown and knit a PDF report out of it   I have tried using   - gt Text lt -  - gt     image1 jpg  lt -   That does not do the trick  Any other way of getting this done

User · Answer

The simple solution given by Jonathan works with a modification to cheat Pandoc. Instead of direct Latex commands such as

\begin{center}
Text
\end{center}

you can define your own commands in the YAML header:

header-includes:
- \newcommand{\bcenter}{\begin{center}}
- \newcommand{\ecenter}{\end{center}}

And then you use:

\bcenter
Text and more
\ecenter

This works for me for centering a whole document with many code chunks and markdown commands in between.

User · Answer

none of the answers worked but this  newcommand  bcenter   begin center    newcommand  ecenter   end center    but then the following problem is that it works for only one figure and then will not for any other figures  I just started learning R I knew it was going to be difficult but what s worst is that there is little to no info that I can refer to

User · Answer

If you are centering the output of an R code chunk  e g   a plot  then you can use the fig align option in knitr       r fig align  center   plot mtcars

User · Answer

If you know your format is PDF  then I don t see how the HTML tag  can be useful    It definitely does not seem to work for me   The other pure LaTeX solutions obviously work just fine   But the whole point of Markdown is not to do LaTeX but to allow for multiple format compilation I believe  including HTML   Therefore  with this in mind  what works for me is a variation of Nicolas Hamilton s answer to Color Text Stackoverflow question                    CENTER TXT ctrFmt   function x     if out type     latex     out type     beamer       paste0    begin center  n   x    n  end center      else if out type     html       paste0   lt center gt  n   x    n lt  center gt      else     x     I put this inside my initial setup chunk  Then I use it very easily in my  rmd file    r ctrFmt  Centered text in html and pdf

User · Answer

I used the answer from Jonathan to google inserting images into LaTeX and if you would like to insert an image named image1 jpg and have it centered  your code might look like this in Rmarkdown   begin center   includegraphics image1   end center    Keep in mind that LaTex is not asking for the file exention   jpg    This question helped me get my answer   Thanks

User · Answer

You can use raw LaTeX in R Markdown  Try this    begin center  Text  end center    There is  of course  a catch  everything between begin      and  end      is interpreted as raw LaTeX by Pandoc  so you can t use this technique to center the output of R code chunks  or Markdown content

User · Answer

There is now a much better solution  a lot more elegant  based on fenced div  which have been implemented in pandoc  as explained here        center data-latex  quot  quot   Some text here         All you need to do is to change your css file accordingly  The following chunk for instance does the job      cat  engine opts   list file    quot style css quot     center     text-align  center           Obviously  you can also directly type the content of the chunk into your  css file      The tex file includes the proper centering commands  The crucial advantage of this method is that it allows writing markdown code inside the block  In my previous answer  r ctrFmt  quot Centered   text   in html and pdf  quot   does not bold for the word  quot text quot   but it would if inside a fenced div  For images  etc    the lua filter is available here

User · Answer

I had the same question  I have tried all solutions provided above and none of them worked    But I have found a solution that works for me  and hopefully for others too    lt center gt     your image caption  image png    lt  center gt    This code will center both the image and the caption  It is essential that you leave lines between  lt center gt   the image code  and  lt  center gt   otherwise the image will be centered but the caption will disappear   If you want your image to have a clickable link  you can embed things like      your image caption  image png   www link to image com    However  the caption will no longer appear   So if you want a clickable caption you will have to do it in two steps    lt center gt       image png    your image caption  www link to image com    lt  center gt    Same here  make sure there are empty lines in between each command ones  If you want both the image and the caption to be clickable  then combine the middle and the last codes above  I hope this helps a bit

User · Answer

None of the answers work for all output types the same way and others focus on figures plottet within the code chunk and not external images    The include graphics   function provides an easy solution  The only argument is the name of the file  with the relative path if it s in a subfolder   By setting echo to FALSE and fig align center you get the wished result        r  echo FALSE  fig align  center   include graphics  image jpg

User · Answer

You can set the center  or other  alignment for the whole document as a Knitr option  using   knitr  opts chunk set echo   TRUE  fig align  center

[r] Centering image and text in R Markdown for a PDF report

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