Gnuplot change color of bars in histogram

Question

is it possible to change the color of bars in a Gnuplot script dynamically? I have the following script

reset
fontsize = 12
set term postscript enhanced eps         


        

Answer 1

Doesn't seem like histogram lets you do it. May be like this:

set boxwidth 0.3
f(v)=v<0?1:2
plot 'bm_speedup.dat' using 0:2:(f($2)):xticlabels(1) with boxes ti "Speedup" lc variable