#  surface_grid_input.txt
#
#  Input to GNUPLOT, causing it to read SURFACE_GRID_GNUPLOT.TXT and
#  create a contour plot of the data.
#
#  Warning: the data must be in a very specific format.
#  The data file will contain records of the form
#    x y z
#  There will be M x N total records.
#  There must be a blank space after each set of M records.
#  The M successive records might all have the same X value,
#  or, if not, they must represent successive points along a line on the surface.
#
#
#  Request PNG output.
#
set term png
#
#  Name the PNG file.
#
set output "surface_grid.png"
#
#  Set the title.
#
set title "Surface plot of 41x41 table Z(X,Y)"
#
#  Set the viewing angle.
#
set view 77, 77
#
#  Put the base plane at the middle of the Z range.
#
set xyplane -0.5
#
#  Remove lines that should be hidden by the surface.
#
set hidden3d
#
#  Timestamp the plot.
#
set timestamp
#
#  Read the data, and display it using lines.
#
splot "surface_grid_gnuplot.txt" with lines
#
#  Terminate.
#
quit