How to use the std function for signal ????

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I have to extract Standard deviantion of multi channel EEG and I dont know how to use the std function can anyone help me please Thanks.

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Answer 1

Jan 2017-3-15

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It depends on what you want to achieve:

If you want to get the standard deviation over the time and the "multi channel EEG" is recorded as [nTimeStep x nChannel] matrix:

SignalStd = std(Signal, 0, 1);

SignalStd = std(Signal, 0, 2);

You see: A specific answer requires more specific details in the question.

afef 2017-3-15

please I want to ask you how can i use the function MEAN for my signal i dont know how to write the code.

Jan 2017-3-15

Did you read doc mean already? It is equivalent to the std command, but without the 2nd input:

SignalMean = mean(Signal, 1);
SignalMean = mean(Signal, 2);