Adding noise to EEG dataset

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dark lion
dark lion 2017-11-12
评论： Kaushik Lakshminarasimhan 2017-11-12
Hello I have an EEG dataset loaded into Matlab in Excel format. I want to add a random white noise to the dataset. And I need to convert the output noisy plot again into an excel file. I have attached the Matlab file.
Please suggest me
Thanks
  2 个评论
Kaushik Lakshminarasimhan
Kaushik Lakshminarasimhan 2017-11-12
You already managed to add noise. So you just want to know how to write the output to an Excel file?
dark lion
dark lion 2017-11-12
Nope I am not getting the output of the noisy signal It is showing an error.

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Kaushik Lakshminarasimhan
I assume you're getting an error in this line:
X = dataset + 2*randn(size(t));
because dataset is an N x 2 array, whereas 2*randn(size(t)) is 1 x N. Also, you don't want to add noise to time. You need to change it to:
X = [time voltage + A*randn(length(t),1)];
A is the variance of noise, you can set A=1 if you wish. Then write to xls using:
xlswrite('noisyEEG.xls',X);
And if you want to plot it:
plot(X(:,1), X(:,2));
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dark lion
dark lion 2017-11-12
thank you very much for your Help the data which i have provided you is a raw EEG data I have to add some noise to the data and give the time voltage values as an input to my circuit
Thank you very much!!!

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