align vertical tab in latex

http://tex.stackexchange.com/questions/52389/vertical-text-orientation-multiple-rows-in-tabular-environment

Bootstrapping

https://www.youtube.com/watch?v=ZCXg64l9R_4
http://parkeloyd.com/output/code/safe_correlate/

set background of IDL plot

https://www.idlcoyote.com/graphics_tips/whitebg.php

take screenshot on mac

http://www.take-a-screenshot.org

Use of Grep

grep -r --include \*.pro B_NU_T *