fy and fz from parameter study and improvement of gearbox whine noise in electric vehicle in matlab

main.m
fy_range = linspace(0.1, 1, 10);
fz_range = linspace(0.1, 1, 10);
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main.m
function noise = gearbox_noise(fy, fz)
  % code to calculate gearbox noise for given fy and fz values
end
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main.m
for i = 1:length(fy_range)
  for j = 1:length(fz_range)
    noise(i,j) = gearbox_noise(fy_range(i), fz_range(j));
  end
end
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main.m
mesh(fy_range, fz_range, noise);
xlabel('fy');
ylabel('fz');
zlabel('Gearbox noise');
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main.m
options = optimset('Display', 'iter');  % set the display option for optimization progress
f_opt = fminsearch(@(params)gearbox_noise(params(1), params(2)), [0.5, 0.5], options);
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