# Unwrap function not operating correctly

3 views (last 30 days)
Nikolaos Zafirakis on 26 Sep 2019
Edited: Stephen23 on 27 Sep 2019
B = (:,1:3);
C = (:,4); % Group packets restart at 0 and finish at a specific number
group = cumsum(C == 0) + double(C(1) ~= 0); % Splits the groups further
% into ones then twos then therees etc...
% [1 1 1 1 1 2 2 2 2 2 2 2 3 3 3 4 4 4]'
Bb = splitapply(@(m) {(unwrap(m/2^15*pi)*2^15/pi)}, B, group); % Splits the groups up and performs the
% caculation unwrap(m/2^15*pi)*2^15/pi
Original output input at B
The result of the algorithm can be seen below. Unfortunately, it is not operating correctly as it has a drift in the y-direction. Can anyone provide any insight into how to correct this code?
Nikolaos Zafirakis on 27 Sep 2019
Edited: Nikolaos Zafirakis on 27 Sep 2019
Hello Guilaume, sorry in the figure I provided,
C =[2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;3;3;3;3;3;3;4;4;4;4;4;4;4;4;4;4;4;4]
To break it up further.
Regarding the values the yellow and blue data lines should not surpass +-60000. The red you have plotted is correct, however the yellow and blue have drifted out of the range required. Thus, by splitting the values up further I got a something solution closer to the truth but now the red value has drifted.
I have MATLAB R2019b for some reason it does not let me input it on the web page.

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