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postscript splot x/y/zlabel rotation and colours

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Hi all,

It's been two/three years since I last picked up GNUPLOT so I'm very rusty! 

I am trying to splot some 3D data. The default terminal on the Unix cluster changes colour according to the Z-value but when I change to a postscript terminal the Z-value is no longer being represented by a change in colour, rather the colour changes according to how close the splot z-value is to the 0,0 of the x and y dimension. 

Also I am not sure how I can rotate the labels along the axis, as the splot of 3D data puts the x and y axis on 45 degree angles. My shameful basic code is below. I would really appreciate any help.

Many thanks
Anthony


set term postscript eps enhanced color linewidth 2 solid font 'Helvetica,20'
set output "color.eps"

set pm3d

set xlabel "ASN - HIS (nm)"
set ylabel "ASN - PRO (nm)"
set zlabel "FES (kJ/mol)"

set ticslevel 0.2
unset colorbox
unset key

set contour base
set pm3d at bs
splot 'FES_mouth.dat' with pm3d

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postscript splot x/y/zlabel rotation and colours distributed.science@googlemail.com - 2015-01-09 14:22 -0800
  Re: postscript splot x/y/zlabel rotation and colours distributed.science@googlemail.com - 2015-01-10 09:37 -0800
    Re: postscript splot x/y/zlabel rotation and colours Ethan A Merritt <EAMerritt@gmail.com> - 2015-01-10 23:09 -0800
      Re: postscript splot x/y/zlabel rotation and colours Gavin Buxton <gavinbuxton@gmail.com> - 2015-01-11 06:09 -0800
      Re: postscript splot x/y/zlabel rotation and colours Gavin Buxton <gavinbuxton@gmail.com> - 2015-01-11 06:12 -0800
        Re: postscript splot x/y/zlabel rotation and colours Gavin Buxton <gavinbuxton@gmail.com> - 2015-01-12 06:15 -0800

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