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42 lines
1.0 KiB
Matlab
42 lines
1.0 KiB
Matlab
% ENUME MICHAŁ SZOPIŃSKI
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% PROJECT C NUMBER 60
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% https://github.com/Lachcim/szopinski-enume
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% coordinate arguments
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argsx = -1:0.1:1;
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argsy = -2:0.5:12;
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% available functions
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functs = {
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"x_1", -67, 50, @(x, y) y + x * (0.5 - x^2 - y^2);
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"x_2", -115, 30, @(x, y) -x + y * (0.5 - x^2 - y^2)
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};
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% plot each function
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for funct = 1:size(functs, 1)
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[functname, cama, camb, functh] = functs{funct, :};
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% evaluate values
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vals = zeros(length(argsx), length(argsy));
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for i = 1:size(argsx, 2)
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for j = 1:size(argsy, 2)
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vals(i, j) = functh(argsx(i), argsy(j));
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end
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end
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% plot
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figure;
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surf(argsx, argsy, vals');
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title(strcat("Gradient of ", functname));
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xlabel('x_1');
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ylabel('x_2');
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zlabel(strcat("d", functname, "/dt"));
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xlim([argsx(1), argsx(end)]);
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ylim([argsy(1), argsy(end)]);
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view(cama, camb);
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grid on;
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set(gcf, 'PaperPosition', [0 0 6 4]);
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set(gcf, 'PaperSize', [6 4]);
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print(strcat('report/', functname, 'gradient'), '-dpdf');
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end
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