mean curve

name.oct

for f = 1:length(file)
  ...
end

% init at the first curve data
BRMean  = Data(1).BR
lg2Mean = Data(1).lg2

% accumulate the rest of data
for f = 2:length(file)
  BRMean  = BRMean + Data(f).BR
  lg2Mean = lgMean + Data(f).lg2
 end
 
 % and now dividide by the number of curve
 BRMean = BRMean/length(file)
 lg2Mean = lg2Mean/length(file)
 
 % and now you can plot it enjoy