Graph Multiple Functions in MATLAB

Question

Jun Young Choi 2020-11-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/647513-graph-multiple-functions-in-matlab

评论： Ameer Hamza 2020-11-14

采纳的回答： Ameer Hamza

rr=140*(1-(0.02/r)^2)+140*(1-4*(0.02/r)^2+3*(0.02/r)^4)*cosd(2*theta);

As for the equation above, I want to plot a graph for theta=0 degrees, 22.5 degrees, 67.5 degrees, and 90 degrees.

Thus the graph would have multiple lines, and there also needs to a legend to show which line is which.

Please help.

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Answer 1

Ameer Hamza 2020-11-14

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/647513-graph-multiple-functions-in-matlab#answer_544303

编辑：Ameer Hamza 2020-11-14

在 MATLAB Online 中打开

This shows an example of how it can be done

r = linspace(0.1, 1, 100);
thetas = [0 22.5 67.5 90];
figure();
axes();
hold on
for i = 1:numel(thetas)
    theta = thetas(i);
    rr = 140*(1-(0.02./r).^2)+140*(1-4*(0.02./r).^2+3*(0.02./r).^4).*cosd(2*theta);
    plot(r, rr);
end
legend_strs = compose('$\\theta=%.1f$', thetas);
legend(legend_strs, 'Interpreter', 'latex', 'Location', 'best', 'FontSize', 16);