清空筛选条件
清空筛选条件

write equation in for loop

5 次查看（过去 30 天）
Ancy S G
Ancy S G 2022-2-17
评论： Voss 2022-2-18
I have to update this equation
  • Pij^(k+1)=[Pij^k-a^k*(xij^k-yij^k)]+
where i represents row, j represents coloumn and k represents the iteration.
How to write this equation in for loop

请先登录，再回答此问题。

采纳的回答

Voss
Voss 2022-2-17
If you want to overwrite the values of a, x, y, and P on each iteration, then maybe you can do this:
P = P-a*(x-y);
If instead you want to store the values of a, x, y, and P for each iteration, then maybe it would be something like this:
P(:,:,k+1) = P(:,:,k)-a(k)*(x(:,:,k)-y(:,:,k));
or perhaps this:
P{k+1} = P{k}-a(k)*(x{k}-y{k});
depending on whether the sizes of P, x, and y might change with each iteration.
  2 个评论
Ancy S G
Ancy S G 2022-2-18
Ok.thank you.
But I have to change the i,j along with each iteration.If a 3*2 matrix is considered,then I want P11^(k+1),P12^(k+1), upto P32^(k+1) and if Pij^(k+1)-Pij^(k)>0.1,then go for next iteration. How it is possible in for loop?
Voss
Voss 2022-2-18
The notation in my answer (the MATLAB syntax) uses all elements of P. In other words, it uses all i,j.
You can apply the condition that Pij^(k+1)-Pij^(k)>0.1 to each individual element of P in a couple of different ways, depending on (Case 1) whether the each element should stop being updated when the condition is no longer met for that element, or (Case 2) whether they all should stop being updated only when the condition is no longer met in all elements.
In either case, the condition can be used to iterate in a while loop like this:
while any(any(P(:,:,k+1)-P(:,:,k) > 0.1))
% do another iteration
end
and then the code within the while loop will update a and x, y either at all elements or only some depending on how you write it.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by