# # $Id: pm3dgamma.dem,v 1.2 2003/10/17 15:02:21 mikulik Exp $ # # Test of gamma correction for gray palettes set pm3d; set palette set palette gray set pm3d map set cbrange [-10:10] set xrange [-10:10] set yrange [*:*] unset ztics unset ytics set samples 101 set isosamples 2 set xtics 2 set palette gamma 0.75 set title "gamma = 0.75" splot x pause -1 "Hit return to continue" set palette gamma 1.0 set title "gamma = 1.0" splot x pause -1 "Hit return to continue" set palette gamma 1.25 set title "gamma = 1.25" splot x pause -1 "Hit return to continue" set palette gamma 1.5 set title "gamma = 1.5" splot x pause -1 "Hit return to continue" set palette gamma 1.75 set title "gamma = 1.75" splot x pause -1 "Hit return to continue" set palette gamma 2.0 set title "gamma = 2.0" splot x pause -1 "Hit return to continue" reset