NeuroAnalyzer tutorials: Edit: Virtual channels and applying formula

Initialize NeuroAnalyzer

using NeuroAnalyzer
eeg = load("files/eeg.hdf");

Create virtual channel:

vc = vch(eeg,
         f="mean(fp1 + fp2) / cz")

1×308480×1 Array{Float64, 3}:
[:, :, 1] =
 2.01373  0.626121  0.217568  …  2.78514  2.07803  0.180071  2.68402

Any external formula/operation/function may be applied to EEG signal using apply() function:

ch_avg = apply(eeg,
               f="mean(obj, dims=1)",
               ch=["Fp1", "Fp2"])

2×1×1 Array{Float64, 3}:
[:, :, 1] =
  0.08839714508574183
 -0.04278170257057378

In the formula eeg indicates EEG object. Function f will be applied to all channels specified by ch. OBJ signal is given using variable obj here.