I find that gnuplot and ps2epsi do not work on Fedora 19. The same packages/scripts work for me on old installations on Fedora 17.
I find this line is printed out multiple times:
Fontconfig warning: "/etc/fonts/conf.d/50-user.conf", line 14: reading configurations from ~/.fonts.conf is deprecated.
I even tried an older version of gnuplot (4.2 patchlevel 6). But it does not help.