Adding noise to EEG dataset

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dark lion 2017-11-12

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评论： Kaushik Lakshminarasimhan 2017-11-12

EEGnoise.m

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

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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 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 2017-11-12

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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 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!!!

Kaushik Lakshminarasimhan 2017-11-12