please help with this function

Question

francis 2013-7-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/82923-please-help-with-this-function

function [th rad]=cartopolar25(x,y

t=atan(y/x); rad=sqrt(x^2+y^2); if if x<0 if y<0 th=180+t return else th=180-t return end else if y<0 th=-t return else th=t return end end

end end

Hi I need help with this code, if you guys see any mistakes please let me know. I have to make a function to determine the polar coordinates from the Cartesian plane, thanks for the help yes I was able to get the degrees now all I need is the radians any tips with this current format thanks

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Answer 1

Narges M 2013-7-23

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在 MATLAB Online 中打开

your function is this:

function [th rad]=cartopolar25(x,y)
th = atan(y/x);
rad = sqrt(x^2+y^2);
if x<0
    if y<0
        th=th+180;
    else
        th=th-180;
    end
else
    if y<0
        th=-th;
    end
end

and you need to call it like this:

[t,r] = cartopolar25(-11,20);

the output will be:

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francis 2013-7-24

yes that was it I got it now

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Answer 2

Jonathan Sullivan 2013-7-23

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https://ww2.mathworks.cn/matlabcentral/answers/82923-please-help-with-this-function#answer_92543

在 MATLAB Online 中打开

help atan2
doc atan2

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francis 2013-7-23

whats that?

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Answer 3

Gorji 2013-7-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/82923-please-help-with-this-function#answer_92544

What is Y and X? Are they matrix? I think the structure of 'if' is incorrect you must use if & elseif & else

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francis 2013-7-23

Y and X are supposed to be the coordinates, if I used that function with the points (-11,20) it should be able to give me radians=2.8 and deg=-118.8, I can do all of that on paper but here I am just trying to figure out I dont know how to defined Y and X, I try by using a vector and still gives me the same error "Undefined function or variable "y".

francis 2013-7-23