Sat Oct  3 15:53:30 2026

grid_surface():
  matplotlib version: 3.5.1
  numpy version:      1.26.4
  python version:     3.10.12
  Make a surface plot Z(X,Y) for a 41x41 table.
  Created data file "grid_data.txt"
  Created command file "grid_commands.txt"
Sat Oct  3 15:53:30 2026