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grid_surface():
  MATLAB/Octave version 9.11.0.2358333 (R2021b) Update 7
  Make a surface plot Z(X,Y) for a 41x41 table.
  Created data file "grid_data.txt"

ans =

    21


  Plot commands stored in 'grid_commands.txt'.

grid_surface():
  Normal end of execution.