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