Juan Sebastián Casallas casallas

If you get the following error

The following classes could not be instantiated: - android.support.v7.internal.widget.ActionBarOverlayLayout

Then set res/values/styles.xml to:

<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">

I found this method http://www.r-bloggers.com/a-quick-way-to-do-row-repeat-and-col-repeat-rep-row-rep-col/

rep.row <- function(x, n){
   matrix(rep(x, each = n), nrow = n)
}

And it seemed sensible if the matrices are stored by column major, however, it seems like filling by rows is quicker

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}}

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

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

These tricks require BibTool, which can be installed using homebrew.

To extract only the used fields call bibtool -x on a .aux file, e.g.

bibtool -x doc.aux -o output.bib

To delete fields that you don't want to share, e.g. notes and file locations,

bibtool -- "delete.field {annote}" -i input.bib -o output.bib

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

	> knitr::knit("xcolor_error.Rnw")


	processing file: xcolor_error.Rnw
	\|...................... \| 33%
	ordinary text without R code

	\|........................................... \| 67%
	label: unnamed-chunk-1 (with options)
	List of 1

	# 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 \|\|=

	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")

	\usepackage{stringstrings} % \capitalize, \caselower
	\newcommand{\sentencecase}[1]{\caselower[e]{#1}\capitalize{\thestring}}