How can I draw graph of y^2=x^2 * (x+3)?

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Lê 2023-11-18

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评论： Walter Roberson 2023-11-18

采纳的回答： Sam Chak

采纳的回答

Sam Chak 2023-11-18

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编辑：Sam Chak 2023-11-18

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Hi @Lê

The fimplicit() function can be used.

f = @(x, y) y.^2 - (x.^2).*(x + 3);

fimplicit(f), grid on

xlabel('x'), ylabel('y')

The original question about the implicit plot has been adequately answered. I believe not many students are aware that it involves an implicit function. However, I agree with @John D'Errico's point, and it's fair to inquire about where to find information regarding the integral. Perhaps you didn't use the correct keywords when searching on Google.

There are both symbolic and numerical approaches. Since the problem of finding the area involves a definite integral, I suggest using the integral() command directly. Click on the link to see some examples:

https://www.mathworks.com/help/matlab/ref/integral.html

Please share your MATLAB code here, and you will get a sense of achievement.