How do I draw a 3-dim. grid graph from 3-Dim scattered data
Suppose your data to be plotted are 3-dimensinonal scattered data
(x,y,z) with arbitrary order. With the splot command,
gnuplot generates points or lines in a 3-dim. space.
# X Y Z
9.862e-01 -8.062e-02 0.001
9.786e-01 -1.134e-01 0.002
9.720e-01 -1.382e-01 0.003
.....
-1.849e-01 -2.165e-01 80.000
-2.412e-01 -1.301e-01 90.000
-2.611e-01 -4.825e-02 100.000
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gnuplot> set xrange [-1:1]
gnuplot> set yrange [-1:1]
gnuplot> set ticslevel 0
gnuplot> splot "datafile.dat" u 1:2:3 with lines
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In order to generate a 3-dim. grid graph from those data, use
set dgrid3d. Height of each mesh is determined
automatically by a weighted average of the data inside the grid.
The number of mesh in the X- and Y-directions can be specified by
set dgrid3d x-mesh, y-mash.
gnuplot> set dgrid3d 30,30
gnuplot> set hidden3d
gnuplot> splot "datafile.dat" u 1:2:3 with lines
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