#!/usr/bin/octave-cli
  
  filename = argv(){1};
  col = eval(argv(){2});

  mult = eval(argv(){3});
  ad_opt = eval(argv(){4});

  if length(col) == length(mult)
  	for i = [1:length(col)]
  		data.freq = load(filename)(:,col(i)).*mult(i);

  		if ad_opt(i) == 1
  			printf(strcat(filename, ' col', num2str(col(i)), ' drift removed
  
  '))
  			data.freq = detrend(data.freq);
  		elseif ad_opt(i) == 2
  			printf(strcat(filename, ' col', num2str(col(i)), ' relative ad : mean=', num2str(mean(data.freq)), '
  
  '))
  			data.freq = data.freq./mean(data.freq);
  		elseif ad_opt(i) == 3
  			printf(strcat(filename, ' col', num2str(col(i)), ' drift removed relative ad
  
  '))
  			data.freq = detrend(data.freq./mean(data.freq));
  		end

  		data.rate = 1;
  		[ad, S, err, tau] = allan(data, 2.^[0:nextpow2(length(data.freq))-3]./data.rate, strcat(strsplit(filename, '/'){end}, num2str(i)), 0);
  		ad_tosave{i} = vertcat(ad, err)';
  	end
  tosave = tau';
  for i = [1:length(col)]
  	tosave = horzcat(tosave, ad_tosave{i});
  end

  save('-ascii', '-double', '-tabs', strcat(strsplit(filename, '.'){1}, '_ad.dat'), 'tosave');

  end