if (output != None and type(output) == type("")):
gnuplot("set term png size 640,480")
gnuplot("set output \""+str(output)+"\"")
if master_title == "":
if (output != None and type(output) == type("")):
gnuplot("set term png size 640,480")
gnuplot("set output \""+str(output)+"\"")
if master_title == "":