function temperature_surf ( X, Y, T, title_string )

%% temperature_surf: surface plot of temperature field.
%
  surf ( X, Y, T, 'Edgecolor', 'None' );
  colorbar ( );
  colormap ( jet );
  xlabel ( '<-- X -->' );
  ylabel ( '<-- Y -->' );
  zlabel ( '<-- T(X,Y) -->' );
  title ( title_string, 'Fontsize', 24 );
  print ( '-djpeg', 'temperature_surf.jpg' );

  return
end
