diff --git a/temp2allan.m b/temp2allan.m
index 1971d13..73c511e 100755
--- a/temp2allan.m
+++ b/temp2allan.m
@@ -4,11 +4,33 @@ filename = argv(){1};
 col = eval(argv(){2});
 mult = eval(argv(){3});
 
-data.freq = load(filename)(:,col).*mult;
-data.rate = 1;
+filename = argv(){1};
+col = eval(argv(){2});
+mult = eval(argv(){3});
+ad_opt = eval(argv(){4});
 
-[ad, s, err, tau] = allan(data, 2.^[0:nextpow2(length(data.freq))-3]./data.rate, '', 0);
-tosave = vertcat(tau, ad, err)';
+if length(col) == length(mult)
+	for i = [1:length(col)]
+		data.freq = load(filename)(:,col(i)).*mult(i);
+		if nargin == 4
+			if ad_opt(i) == 1
+				printf(strcat(filename, ' col', num2str(col(i)), ' drift removed\n\n'))
+				data.freq = detrend(data.freq);
+			elseif ad_opt(i) == 2
+				printf(strcat(filename, ' col', num2str(col(i)), ' relative ad : mean=', num2str(mean(data.freq)), '\n\n'))
+				data.freq = data.freq./mean(data.freq);
+			elseif ad_opt(i) == 3
+				printf(strcat(filename, ' col', num2str(col(i)), ' drift removed relative ad\n\n'))
+				data.freq = detrend(data.freq./mean(data.freq));
+			end
+		endif
+		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', strcat(strsplit(filename, '.'){1}, '_ad.dat'), 'tosave');
-
-exit
+end