Graphing a two variable limit

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Stephen 2022-10-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1819220-graphing-a-two-variable-limit

评论： Chunru 2022-10-7

采纳的回答： Chunru

Hi, I am new to MATLAB and I can't seem to figure out how to graph a two variable limit like:

I've seen answers on how to create a two-variable function, or how check the limit for continuity, but I hope to see it graphed in relation to

. I have gotten errors saying that the function is too complex, or that Z must be a matrix, and I have no clue how I should handle those kinds of errors.

Thanks in advance for any help that is given!

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Torsten 2022-10-7

编辑：Torsten 2022-10-7

What do you want to graph here ? The function is defined and continuous at (0,1) with value (acos(0))/1 = pi/2.

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采纳的回答

Chunru 2022-10-7

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1819220-graphing-a-two-variable-limit#answer_1068415

在 MATLAB Online 中打开

x= -0.5:.01:0.5;

y = 0.5:.01:1.5;

[xx, yy] = meshgrid(x, y);

zz = acos(xx./yy)./(1+xx.*yy);

%zz = nan(size(xx));

% idx = abs(xx./yy)<=1;

% zz(idx) = acos(xx(idx)./yy(idx))./(1+xx(idx).*yy(idx));

% whos

contourf(xx, yy, zz);

hold on

plot(0, 1, 'rd')

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Stephen 2022-10-7

I understand that, I was just asking the wrong question originally and got the correct answer anyways, which is my fault on my part. Thank you both for the help anyways, sorry about the confusion!