diff --git a/oallanplot.m b/oallanplot.m
new file mode 100755
index 0000000..7514fd6
--- /dev/null
+++ b/oallanplot.m
@@ -0,0 +1,54 @@
+#!/usr/bin/octave-cli --persist
+
+# allanplot.m computes Allan deviation from temporal dataset
+#
+# use :	allanplot.m file.dat column_i gain_i ad_opt
+#		allanplot.m file.dat [column_i,column_j] [gain_i,gain_j] [ad_opt_i,ad_opt_j]
+#
+# inputs:
+#	file.dat : [string]			file to load
+#	columns : int or [int]		columns to load
+#	fs : int or [int]			sampling frequency
+#	gains : float or [float]	gains to apply
+#	ad_opt : int or [int]		ad options :
+#										0 direct allan computation
+#										1 drift removed ad
+#										2 relative ad
+#										3 relative drift removed ad
+
+filename = argv(){1};
+col = eval(argv(){2});
+fs = eval(argv(){3});
+mult = eval(argv(){4});
+ad_opt = eval(argv(){5});
+
+if length(col) == length(mult)
+	figure
+	hold all
+	grid on
+	cc = 'bkcgmry';
+	for i = [1:length(col)]
+		data.freq = load(filename)(:,col(i)).*mult(i);
+		if nargin == 5
+			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 = fs(i);
+		[ad, S, err, tau] = allan_overlap(data, horzcat(reshape([1:0.1:9]'.*10.^[0:round(log10(length(data.freq)))-1],1,[]), 10^(round(log10(length(data.freq)))-1))./data.rate, strcat(strsplit(filename, '/'){end}, num2str(i)), 0);
+		loglogerr(tau, ad, err, strcat(cc(mod(i, length(cc))), '-s'))
+		leg{i} = strcat(filename, ' col', num2str(col(i)));
+		axis(10.^ceil(log10([tau(1), tau(end)])))
+		hold on
+	end
+	legend(leg)
+	input("Press to continue...");
+end
+exit
diff --git a/temp2oallan.m b/temp2oallan.m
new file mode 100755
index 0000000..038c5b0
--- /dev/null
+++ b/temp2oallan.m
@@ -0,0 +1,36 @@
+#!/usr/bin/octave-cli
+
+filename = argv(){1};
+col = eval(argv(){2});
+mult = eval(argv(){3});
+
+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 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_overlap(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');
+end