Ground electrode

[fernandoandreotti]

I commented out the calculus using the ground electrode:

ground = repmat(mean(mixture),NB_ELEC,1);
mixture = mixture - ground;
mecg = mecg - ground;
fecg = cellfun(@(x) x - ground,fecg,'UniformOutput',0);
noise = cellfun(@(x) x - ground,noise,'UniformOutput',0);

A better solution then averaging the channels should be found. e.g. defining a grond electrode somewhere on the models back.

[fernandoandreotti]

Done, added input parameter which specifies the location of the reference electrode. By default it is on the back.