#4297 plot3d() error with Gnuplot 6

[Wolfgang Dautermann]

Gnuplot 6 was released recently. When plotting with Gnuplot 6, e.g. plot3d() creates an error message:

(%i1) plot3d(x+y,[x,1,4],[y,1,4]);
(%o1)                                false
(%i2) 
gnuplot> set pm3d hidden3d 100 border lw 0.5 lt rgb "#000000"
                           ^
         line 0: invalid pm3d option

Best regards, Wolfgang

[Gunter Königsmann]

Resolved with commit f1fa57565263144e4ca7581facf740807c830fbf