Print TiKz figures from matlab

Go to

http://win.ua.ac.be/~nschloe/content/matlab2tikz

download the zipfile, place .m-scripts in matlab working directory.
Print to TiKz figure from matlab with

matlab2tikz( 'myfile.tikz' );

correct the plot labels (escape %, remove or add $ for math mode), embed into
LaTeX file by

\newlength\fheight \newlength\fwidth \setlength\fheight{4cm} \setlength\fwidth{6cm} \input{myfile.tikz}

Print last rows of some result files

tail -n 1 -q ../../data/bralibase/unaligned/*/*.res

Loop over multiple files

Loop over multiple input files and do something, beep when done.

 
for i in `ls ../../data/bralibase/unaligned/*/*.fa`; do perl planACstar.pl -p=9 -q=9 $i >> $i.res; done; beep

print every even / odd row

awk '{if(NR%2!=1)print}'

Split PDF into single pages

pdftk p_node_edit_operations.pdf burst output p_node_edit_operations_%02d.pdf

Colour a vector depending on a condition in gnuplot

plot "data.txt" using 1:2:(+0):(-($2-$3)):(($2 > $3) ? (rgb("0","255","0")):(rgb("255","0","0"))) notitle with vectors lc rgb variable

plot arrows between values in gnuplot

plot "data.txt" using 1:2 title "orig" lt 2 pt 2, \
 "data.txt" using 1:3 title "step 1 1" lt 1 pt 3, \
 "data.txt" using 1:2:(+0):(-($2-$3)) notitle with vectors arrowstyle 1