It is easy enough to do something like \Sexpr{1 + 1}. But how can I do \Sexpr{mymatrix} with mymatrix being a matrix object in R workspace? More generally, how can I print object that is more complex than just a number using inline code chunk?

  • 1
    Use string processing functions to turn your complex objects into a character string. BTW, this is not a question specific to LaTeX, so someone may have to move it to StackOverflow.
    – Yihui Xie
    Apr 17, 2014 at 6:04
  • @Yihui I am not sure I understand how to turn a matrix into a string while preserving its block form. Could you tell me the name of the "string processing function"?
    – Heisenberg
    Apr 18, 2014 at 20:01

1 Answer 1


To answer your question in the comment: there is no single name. I said functions, and I mean string manipulation functions like paste(), substr(), and so on. You may take a look at the packages for generating tables, and try capture.output(), then paste(). But I doubt if it is worth it -- why not using a code chunk? For example,



You can certainly make it in the inline code if you do not mind the long R expression, e.g. \Sexpr{paste(capture.output(kable(mymatrix)), collapse='\n')}.

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