How do I save each value for this loop?

6 次查看（过去 30 天）

Soungeon Park 2018-9-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/420387-how-do-i-save-each-value-for-this-loop

评论： Star Strider 2018-9-24

N = 5;
A = 0;
w = 1; %where omega is equals to 2pi/tau and tau is equals to 2pi
a_0 = pi/4;
for i = 1:1:N
    a_n = 2*(-1)^N-1 / pi*N^2;
    A(i) = A + a_n;
end

I'm trying to make a fourier series code and this is part of it. I'm trying to save each value I get from that for loop and use it later for the calculation and plotting. My problem is that whenever I run this, I get an error message saying

In an assignment  A(:) = B, the number of elements in A and B must be the same.
Error in test (line 9)
    A(i) = A + a_n;

So as far as I understand, The first loop is going to be okay because A(1) will be a value of A+a_n, which is a sum of scalar, but from second loop, variable A becomes vector but a_n is still scalar so it's causing this error.

How do I solve this error and make it run?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Star Strider 2018-9-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/420387-how-do-i-save-each-value-for-this-loop#answer_338004

在 MATLAB Online 中打开

I am not certain what you want.

Try this:

N = 5;
A = 0;
w = 1; %where omega is equals to 2pi/tau and tau is equals to 2pi
a_0 = pi/4;
for i = 1:1:N
    a_n = 2*(-1)^N-1 / pi*N^2;
    A(i+1) = A(i) + a_n;
end