Resolving Parse/Undefined Errors

Question

John Lynch 2020-12-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/696015-resolving-parse-undefined-errors

回答： Aman Vyas 2020-12-23

The last error I'm getting for a school project. When I run code to adjust the values of an input array, it returns a message stating that 'omega' and 'h' are undefined functions or variables. I haven't run into this before, mostly because MatLab hasn't ever had an issue with parsing or giving a variable type to any of my lines. I'm wondering if it may occur with the for loop, once 'omega' and 'h' are remedied. Does anyone know how to address this?

function y = Filter(u)

c = 343; % m/s

f = 1000; % Hz

omega = 2 * pi * f;

j = sqrt(-1);

h = ifft(sqrt(j * omega / c));

x_s = 0;

for i = 1:length(u)

u(i) = (1 / (2 * pi)) * u(i) * h * (x_0 / (abs(x_0 - x_s)^2));

% we will be implementing the phase delay my adding empty samples on

% the beginning of the sample array

end

y = u;

All help is most appreciated.

2 个评论
显示无隐藏无

Matt Gaidica 2020-12-17

The only thing I see undefined is x_0. Note that Filter is reserved in MATLAB, and j should be predefined. Post the actual line of code and specific errors if you are still having trouble.

John Lynch 2020-12-17

Thanks for the tip on j (it reccommended changing to 1i). I added the x_0 assignment as 'value', which is what I'm labelling the slider control linked to the script. However, the error is still occurring. Forgive me if this is lengthy...

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Aman Vyas 2020-12-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/696015-resolving-parse-undefined-errors#answer_582702

Hi,

I ran the part of the code from my end and for me omega is not undefined and also h is properly defined. I think issue might be coming from some u value which is coming from some other piece of code.

Attached is the screesnshot of values read properly in the window and working fine.

Hope it helps !