# need help with loop

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Yash Raj Haldaniya el 24 de Abr. de 2022
Respondida: Bharat Chandra Mukkavalli el 11 de Jul. de 2022
hello guys, i'm very new to matlab and currently facing some problems in loop coding.
so firstly i want to make a loop of a matrix i don't how much its size will be.
so i've an equation for a node like phi(i, j)= {some constant}*{(phi(i-1, j-1)-2*phi(i, j-1)+phi(i+1, j-1)} Where i is an number that shows my node location in X-Y plane and j shows my node location in Z plane. its kind of taylor series problem i think.
i want this loop to run till i get phi(i, j)= phi(i, j-1) and store all the values in a matrix.(for storing i and j can also work as raw and column)
hopefully you guys can give me some tips.
Thank You
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Sam Chak el 24 de Abr. de 2022
@Yash Raj Haldaniya, Can give an example using a simple matrix like the following?
M = [2 1; 4 3]
M =
3 1
4 2
Yash Raj Haldaniya el 24 de Abr. de 2022
i'm attaching what i've done so far so you can get an idea. please dont mind the messy code im very new in this.

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### Respuestas (1)

Bharat Chandra Mukkavalli el 11 de Jul. de 2022
Hi,
I went through the code but unfortunately I couldn't understand what you are trying to do.
Please explain in detail what it is you are trying to achieve.
I have changed the loop to a nested loop and modified the if condition (from "==" to "isequal()"), since the original code was throwing errors.
Please find the attached updated code file.
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