Problem with a for loop?
显示 更早的评论
Hello i want to write a for loop inside another for loop .
I drew this as an example to make it easier to understand.
My idea was to code something like this but it didnt work:
%%%%
for a = 1:200
for b = 1:7200
Calc(b,a) = (Array1(b) * Array2(b,a)) + (Array1(b-1) * Array2(b-1,a-1));
end
Table(b,a) = Calc(b,a) / constant;
end
%%%%
I would be very grateful if someone could help .
Thanks in advance.
3 个评论
Julian
2023-9-7
In your code is Calc, Table and Array of the dimension 7200x200 but in your picture 200x7200.
malik abdelli
2023-9-7
采纳的回答
The size of your code and the size of the picture are different.
If you want the size of your code you have to change a and b in your matrices.
Calc = zeros(200,7200);
Table = zeros(200,7200);
for a = 2:size(Calc,1)
for b = 2:size(Calc,2)
Calc(a,b) = (Array1(b) * Array2(a,b)) + (Array1(b-1) * Array2(a-1,b-1));
end
Table(a,:) = Calc(a,:) / CONSTANT;
end
And you should try not to work with for-loops but with matrix operations. These are much faster in Matlab.
I don't know which dimensions are correct now, but for my code the quick variant should look like this:
Calc(2:end,2:end) = (Array1(2:end) .*Array2(2:end,2:end)) + (Array1(1:end-1) .*Array2(1:end-1,1:end-1));
Table = Calc/CONSTANT;
3 个评论
malik abdelli
2023-9-7
编辑：malik abdelli
2023-9-7
Julian
2023-9-7
Oh, yes the loops have to start at 2 then, because otherwise you have 0 as index and in Matlab the indices start at 1.
malik abdelli
2023-9-7
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