#!/usr/bin/octave-cli --persist
  
  filename = argv(){1};
  col1 = eval(argv(){2});
  col2 = eval(argv(){3});
  mult1 = eval(argv(){4});
  mult2 = eval(argv(){5});
  
  if length(col1) == length(mult1)

  	figure
  	hold all
  	grid on
  	cc = 'bkcgmry';
  	for i = [1:length(col1)]
  		data.freq = load(filename)(:,col1(i)).*mult1(i);
  		data.freq2 = load(filename)(:,col2(i)).*mult2(i);
  		data.freq = data.freq(1:min(length(data.freq), length(data.freq2)));
  		data.freq2 = data.freq2(1:min(length(data.freq), length(data.freq2)));
  		if eval(argv(){end-1}) == 1
  			printf('
  data1 drift removed
  
  ')
  			data.freq = detrend(data.freq);
  		end
  		if eval(argv(){end}) == 1
  			printf('
  data2 drift removed
  
  ')
  			data.freq2 = detrend(data.freq2);
  		end
  		data.rate = 1;
  		[ad, S, err, tau] = allan_cov(data, 2.^[0:nextpow2(length(data.freq))-3]./data.rate, strcat(strsplit(filename, '/'){end}, num2str(i)), 0);
  		loglogerr(tau, ad, err, strcat(cc(mod(i, length(cc))), '-s'))
  		leg{i} = strcat(filename, ' cov col', num2str(col1(i)), ' col', num2str(col2(i)));
  		axis(10.^ceil(log10([tau(1), tau(end)])))
  		hold on
  	end
  	legend(leg)
  	input("Press to continue...");

  end
  exit