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07-Oct-2025 18:41:00

contour_gradient_test():
  MATLAB/Octave version 9.11.0.2358333 (R2021b) Update 7.
  Test CONTOUR_GRADIENT.

CONTOUR_GRADIENT_TEST01
  Draw a combined contour and gradient plot for the function
    f(x,y) = 0.5 * ( 3 * x.^2 + 4 * x .* y + 6 * y.^2 ) - 2 * x + 8 * y
  over the range [-3,3]x[-3,3].
  Graphics saved as "contour_gradient_test01.png"

CONTOUR_GRADIENT_TEST:
  Normal end of execution.

07-Oct-2025 18:41:06