i need to plot the EEG in matlab.. i have downloaded the data base which is in .txt format. bt i am unable to plot it.. plz help

5 次查看（过去 30 天）
joyaprita
joyaprita 2013-11-2
评论： joyaprita 2013-11-3
x=load('F001.txt');
y=fft(x)
PS=abs(y).^2;
N=length(x);
fs=1000;
freq=(1:N/2)*fs/N;
plot(freq,PS)
this is not working,... an error is reported
Error using plot Vectors must be the same lengths.
Error in PLOT (line 7) plot(freq,PS)

请先登录，再回答此问题。

采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2013-11-2
Look at freq=(1:N/2)*fs/N ,its length is different from PS length
  5 个评论
显示 3更早的评论
Azzi Abdelmalek
Azzi Abdelmalek 2013-11-2
编辑：Azzi Abdelmalek 2013-11-2
x=load('F001.txt');
y=fft(x)
PS=abs(y).^2;
N=length(x);
fs=1000;
freq=(0:N-1)*fs/N;
plot(freq,PS)
If you want a symetric plot for frequencies: [-freq,freq]
freq=(0:ceil(N/2)-1)*fs/N;
PS=PS(1:numel(freq));
plot([-freq freq],[fliplr(PS) PS])

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 EEG/MEG/ECoG 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