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library(sqldf)
library(doBy)
library(plyr)
library(data.table)
 
n<-100000
grp1<-sample(1:750, n, replace=T)
grp2<-sample(1:750, n, replace=T)
d<-data.frame(x=rnorm(n), y=rnorm(n), grp1=grp1, grp2=grp2, n,
replace=T)

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Here is how you can make a table in GFM format using knitr + ascii

render_gfm()
gfm_table <- function(x, ...) {
    require(ascii)
    y <- capture.output(print(ascii(x, ...), type = "org"))
 # substitute + with | for table markup

al2na

git cheat-sheet

The git command-line utility has plenty of inconsistencies http://steveko.wordpress.com/2012/02/24/10-things-i-hate-about-git/

A GUI like http://sourcetreeapp.com is often helpful, but staying on the command line usually quicker. This is a list of the commands I use most frequently, listed by funcional category:

current state

git status list which (unstaged) files have changed

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.Rproj.user
.Rhistory
.RData
*.Rproj
*.html