allanplot.m
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#!/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(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