Question

I am typing this in textedit and load it into gnuplot later. When I do so the image is slightly off the top of the screen which means I can’t see some of it. Is there a way to shift the entirety of the imaged produced down, or start the z-axis lower on the image?

Also, how do I make either my points or my lines black? Currently the lines for my sphere are red and the points are blue.

set pointsize 2
set tics
set border
unset key
set size ratio -1
set size square
unset xzeroaxis
unset yzeroaxis
unset zzeroaxis
# linetype linewidth 
set xrange[-1.2:1.2]
set yrange[-1.2:1.2]
set zrange[-1.2:1.2]
set view equal xyz
set xyplane at -1.2
set parametric
set isosamples 20
set hidden3d
set urange [0:2.0*pi]
set vrange [-pi/2:pi/2]
r=1.0;
# Parametric functions for the sphere
fx(v,u) = r*cos(v)*cos(u)
fy(v,u) = r*cos(v)*sin(u)
fz(v)   = r*sin(v)
splot fx(v,u),fy(v,u),fz(v),"mypoints" u 1:2:3 w p 3

Thanks, A.

Answer 1

Ok, so basically there are loads of issues that need solving so here goes:

1) Don’t shift the picture down, get rid of the little tag end from the z part of the border. This makes the picture more central.

To do this: set ticslevel 0.0

2) Aspect ratio is not maintained in X11 so it looks all squashed. This is spoken about here:

http://sourceforge.net/tracker/index.php?func=detail&aid=3331162&group_id=2055&atid=102055

The workaround as they say is to set the size of window that X11 outputs to to be square, to do this: set terminal x11 size 800,800

3) Note, you don’t now need: set xyplane at -1.2 (or what ever z value you want) as this is taken care of using the set ticslevel command.

So now I have this:

set pointsize 2
set tics nomirror
set ticslevel 0.0
set border
set view equal xyz
unset key
unset xzeroaxis
unset yzeroaxis
unset zzeroaxis
# linetype linewidth 
set xrange[-1.2:1.2]
set yrange[-1.2:1.2]
set zrange[-1.2:1.2]
set parametric
set isosamples 20
unset hidden3d
set urange [0:2.0*pi]
set vrange [-pi/2:pi/2]
r=1.0;
# Parametric functions for the sphere
fx(v,u) = r*cos(v)*cos(u)
fy(v,u) = r*cos(v)*sin(u)
fz(v)   = r*sin(v)
splot fx(v,u) w lines lc rgb "black",fy(v,u) w lines lc rgb "black",fz(v) w lines lc rgb "black","mypoints" u 1:2:3 w points lc rgb "red" p 2

Hope this helps people in future.