casallas

1. Get authors:

svn log --quiet http://path/to/root/of/project | grep -E "r[0-9]+ \| .+ \|" | cut -d'|' -f2 | sed 's/^ //' | sort | uniq

2. Make an authors.txt file containing, e.g.,

author = Name LastName <auth@mail.com>
author2 = Name2 LastName2 <auth2@mail.com>

casallas

This chunk below is from the child document.

<<set-parent, echo=FALSE, cache=FALSE>>=
if(!exists("master_mode")) master_mode <- F
if(!master_mode)
  knitr::set_parent('knitr-include.Rnw')
@

<<test-child, out.width='2in', fig.show='asis'>>=
1+1

casallas

# Based on http://notstatschat.tumblr.com/post/63237480043/rock-paper-scissors-wilcoxon-test
d1 <- c(4, 4, 4, 4, 0, 0)
d2 <- c(3, 3, 3, 3, 3, 3)
d3 <- c(6, 6, 2, 2, 2, 2)
d4 <- c(5, 5, 5, 1, 1, 1)

wilcox.test(d1, d2, alternative="greater")
wilcox.test(d2, d3, alternative="greater")
wilcox.test(d3, d4, alternative="greater")
wilcox.test(d4, d1, alternative="greater")

casallas

res <- apply(installed.packages(), 1, function(ip){require(package=ip["Package"], lib.loc=ip["LibPath"], character.only=T)})
res[res==F]

casallas

Mimicing Matlab's ezpolar in R, with ggplot2

In MATLAB/octave plotting stuff in polar coordinates is really easy, e.g. the cardioid $r(\theta) = 1+cos(\theta)$, $0 < \theta < 2\pi$ is as simple as:

ezpolar('1+cos(t)',[0,2*pi])

In ggplot, more verbose is needed

casallas

library(microbenchmark) # microbenchmark
library(pryr) # mem_used
library(ggplot2) # qplot

devtools::dev_mode(T)

benchmark_pipe_qplot <- function(x){
  library(magrittr)
  print(mem_used())
  cat("------\n")

casallas

Suppose you want to change the following

original		new
a \ttimes b	->	=
a \\ttimes b	->	=
a_2 \ttimes b	->	a_2 \btimes b
a_2 \\ttimes b	->	a_2 \\btimes b
a_{2} \ttimes b	->	a_{2} \btimes b
a_{2} \\ttimes b	->	a_{2} \\btimes b

casallas

# return a if a is defined and not null, otherwise return b
`%|%` <- function(a, b){
  try({
    if(!is.null(eval(substitute(a))))
      return(a)
    }, silent=TRUE);
  b
}

# assign b to a if a is undefined or null, compare to ruby's ||=

casallas

For some reason the following generates some errors in LaTeX (even though the output is correct)

$S_\underline{0}$

My solution was to enclose the underline statement within \mathrm

$S_\mathrm{\underline{0}}$

casallas

http://tex.stackexchange.com/questions/14377/how-can-i-test-for-the-current-font

\makeatletter
\newcommand{\showfont}{encoding: \f@encoding{},
  family: \f@family{},
  series: \f@series{},
  shape: \f@shape{},
  size: \f@size{}
}
\newcommand{\iffont}[3]{\ifthenelse{\equal{\f@family}{#1}}{#2}{#3}}