how many emg chanels you use

Dear Othmane Kada, i am using 2 channel

Without knowing the context of that sentence it is hard to say exactly what they mean, but I think it means that the EMG segment starts at the beginning of the moment and ends 256ms after the beginning of the moment. In matlab this data set would look something like :

EMG_sample = EMG_data(time_moment*Fs:(time_moment + 256)*Fs)

where time_moment is the time (in milliseconds) when the moment begins, Fs is the sampling frequency of the EMG signal, and EMG_data is an array containg the EMG data set. 

Hope this helps

dear james sorry for my late reply 

plug in your device and look how many value it gives you in 

256 ms we will name this n

;  you may use the milisecond time function 

then your data will be a matrix of (2,n)

then you begin your processing

nb

the value of (n)  depends on the computer speed

Dear James

About how to implement it, access stack over the website.

Regards