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29 lines
1.1 KiB
Matlab
29 lines
1.1 KiB
Matlab
% graph the complex roots of a function
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function printComplexGraph(printComplexGraph, algorithmName, algorithm, rootBrackets, plottitle)
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figure();
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grid on; % Get y values lines
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hold on; % Retain current plot when adding new plots
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title([plottitle, algorithmName]);
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xlabel("Real part");
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ylabel("Imaginary part");
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set(gca, 'XAxisLocation', 'origin'); % Set properties of current axis
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% find all zeros within the bracket using the given algorithm
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[~, steps] = algorithm(printComplexGraph, rootBrackets(1), rootBrackets(2), 1e-15);
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% plot first step
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text(real(steps(1, 1)), imag(steps(1, 1)), 'start', 'HorizontalAlignment', 'center', 'VerticalAlignment', 'top');
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% plot steps on graph
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plot(real(steps(1, :)), imag(steps(1, :)), '-x');
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% plot last step
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text(real(steps(1, end)), imag(steps(1, end)), 'end', 'HorizontalAlignment', 'center', 'VerticalAlignment', 'top');
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% print root table
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disp([plottitle, ' (', algorithmName, ')']);
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columns = {'step', 'root', 'abs value at root'};
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disp(table([1:size(steps, 2)]', steps(1, :)', abs(steps(2, :))', 'VariableNames', columns));
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end
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