Error exercise roots of the bessel function
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Could someone help me find the mistake I am making?
The exercise is as follows:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/692609/image.png)
My code is the following:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/692614/image.png)
I don't know why my root values of the Bessel function are bad.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/692619/image.png)
3 Comments
Walter Roberson
on 22 Jul 2021
You assign to r(6) first using 4 as the starting approximation. If everything goes well, you will get the root that is close to 4.
You assign to r(5) second using 7 as the starting approximation. If everything goes well, you will get a root that is close to 7. If all went well, this root will be after the root that was near 4, so it should be after the one for 4 in the r vector. But you stored it into r(5) which will be before the one for 4 in the r vector.
Why are you storing into r(6) then r(5) then r(4) ?
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