Adding noise to EEG dataset
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dark lion
on 12 Nov 2017
Commented: Kaushik Lakshminarasimhan
on 12 Nov 2017
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 Comments
Kaushik Lakshminarasimhan
on 12 Nov 2017
You already managed to add noise. So you just want to know how to write the output to an Excel file?
Accepted Answer
Kaushik Lakshminarasimhan
on 12 Nov 2017
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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