set size ratio -1
This can be useful in plotting the wavefunctions on a bunch of sites. For example say the 1 and 2 column has the x and y coordinates of the sites. The 3 rd column contains the wavefunction amplitude.
pl ‘./fort.80’ u 1:2:($3)*10:3 w p pt 7 ps variable palette
The above command will make both the size of the point and the color bar a function of the wavefunction amplitude.
say all files end with *.txt
grep ‘anything’ *.txt
Just type time before running the executable
for example, if the executable is a.out , run the following
Courtesy : Mit and http://stackoverflow.com/questions/385408/get-program-execution-time-in-the-shell
Continue line in fortran using & symbol to the next line (Gfortran)