87 lines
2.2 KiB
Org Mode
87 lines
2.2 KiB
Org Mode
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# -*- mode: org -*-
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#+OPTIONS: LaTeX:t
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* Sweave and org-mode
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If you're reading a PDF version of this document, you should also
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look at [[file:testing.Rorg][testing.Rorg]] (the source file) and [[file:testing.org][testing.org]] (the output
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of the Sweave process).
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Keep in mind that one of the advantages of a block-based approach is
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using \texttt{C-'} to edit code in its native mode.
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** Use the Sweave package for latex formatting
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Org allows us to issue commands to be included in \{LaTeX} export.
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#+LATEX_HEADER: \usepackage{Sweave}
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** R blocks
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The first argument to an R block when using Sweave is the label for
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that block.
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Not all R blocks are printed. Sweave options allow the printing of
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the evaluated code, the output of the code, both, or neither.
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*** R code that is not printed
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*** R code that is printed
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#+BEGIN_LaTeX
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\begin{Schunk}
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\begin{Sinput}
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> c <- 4
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\end{Sinput}
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\end{Schunk}
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#+END_LaTeX
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We can use block labels to embed blocks by reference (even if they
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weren't printed before).
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*** R code that references other blocks
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#+BEGIN_LaTeX
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\begin{Schunk}
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\begin{Sinput}
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> a <- 3
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> b <- 6
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> c <- 4
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> a + b + c
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\end{Sinput}
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\begin{Soutput}
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[1] 13
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\end{Soutput}
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\end{Schunk}
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#+END_LaTeX
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** Inline references to R data
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We can evaluate R code inline.
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*** Used in text
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The value of =a= is 3.
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*** Used in a table
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| a | b | c | TOTAL |
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|-------+-------+-------+---------------|
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| 3 | 6 | 4 | 13 |
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** Single-line R commands
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If we want a line of R code to be evaluated but not printed,
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there's a convenient shorthand. This only works for single lines
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of R code, but you can have more than one in a row.
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#+R: library(lattice)
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#+R: data(cars)
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** Graphics
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We use values defined elsewhere in the buffer to produce this
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graph. The new CAPTION and LABEL arguments work just fine.
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#+CAPTION: speed by distance
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#+LABEL: fig:speed_by_distance
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#+BEGIN_LaTeX
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\begin{Schunk}
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\begin{Sinput}
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> require(lattice)
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> print(xyplot(speed ~ dist, cars, panel = function(x, y, ...) {
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+ panel.xyplot(x, y, ...)
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+ panel.abline(h = a)
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+ panel.abline(v = b)
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+ }))
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\end{Sinput}
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\end{Schunk}
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#+END_LaTeX
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[[./testing-004.pdf]]
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