Multi-value grep/match in R

	> df<-data.frame(names=c("a","b","c"),age=c(1,2,3))
	> df
	names age
	1 a 1
	2 b 2
	3 c 3
	values_to_grep<-c("a","b")
	> unique (grep(paste(values_to_grep,collapse="|"),
	+ df$names, value=TRUE))
	[1] "a" "b"

view raw example_multi_grep hosted with ❤ by GitHub

Uploading large files to Github

Git Large File Storage : https://git-lfs.github.com/

Very useful if you want to store images / genome indexes etc.

Reading space-separated key:value text file into bash array

	# param1 : name of text file
	declare -A myArray
	filename="$1"
	while read -r line
	do
	name="$line"
	name=($name)
	myArray[${name[0]}]=${name[1]}
	done < "$filename"

view raw txt2array.sh hosted with ❤ by GitHub

Using pip to install Python dependencies

Recently I ran into problems of incompatibilities in dependencies, especially when running Python-based scripts (numpy & pandas, essentially the scipy suite).

The easiest way to avoid these troubles (I hope it works for you too!) is to install them using pip rather than your Linux distributions repository (eg. through Ubuntu's apt-get install).