An alternative to sweave
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man Documentation tweaks Aug 1, 2010


Decumar is a tool for interleaving latex and R. It uses specially formatted comment blocks, so your file is always valid latex.

Decumar is similar to sweave, but comes from a slightly different heritage. As well as deriving inspiration from literate programming, it also draws ideas from code generation. Why should you use decumar instead of sweave?

  • you only need one file
  • it's always valid latex
  • caching is built in
  • you don't need to manually print ggplot2 and lattice plots
  • more types of output (figures, listing, ...)

Basic format

Decumar blocks look like this:

%   OPTION1: value 1
%   OPTION2: value 2
% a <- 10
% a + b


Decumar expects the following in your preamble:



Decumar currently supports the following block types:

  • DEFAULTS: set up default parameters

  • CODE: execute code, but don't display it

  • LISTING: display code, but don't execute it

  • CODELISTING: execute and display code

  • INTERWEAVE: interweave each line of code with its results

  • GRAPHIC: insert a bare graphic

  • FIGURE: insert multiple graphics in a floating figure

  • FIGLISTING: insert a figure and the display the code used to create it