Count peaks in a data set
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello,
I have a set of data of volumes in the lungs by mechanical ventilation. I want to count the peaks in this data to devide the total volume by this value to get the tidal volumes. How can I get this out of a set of data? We have very much data, so our script is like this:
files=dir('*.log');
M=NaN(length(files),1);
Lek=M;
B=M;
C=M;
R=M;
PS=M;
TV=M;
for i=1:length(files)
out=textscan(files(i).name,'M%f_Lek%f_B%f_C%f_R%f_PS%f');
A = readcell(files(i).name); %data inladen
Z = string(A);
time = Z(7:end,1); %van time een vector maken
time = strrep(time, ',', '.'); %komma's in vector in punten veranderen
time = str2double(time);
flow = Z(7:end,2);
flow= strrep(flow, ',', '.');
flow = str2double(flow);
flow = flow./60;
flowpos = flow;
flow(flow<0)= 0;
RR=23;
volpos = trapz(time, flow);
TV(i)= (volpos./RR);
TV(i)= TV(i).*1000;
M(i)=out{1};
Lek(i)=out{2};
B(i)=out{3};
C(i)=out{4};
R(i)=out{5};
PS(i)=out{6};
end
T=table(M,Lek,B,C,R,PS,TV,'VariableNames',{'M','Lek','B','C','R','PS','TV'})
Because the tidal volumes vary a lot, I want to get a function which looks at the other values and not set a fixed treshold. Can anyone help me with this?
2 commentaires
Adam
le 28 Mai 2019
If you have the Signal Processing Toolbox
doc findpeaks
gives you various options to specify how to define what counts as a significant peak.
Will Reeves
le 14 Juil 2022
Modifié(e) : Will Reeves
le 14 Juil 2022
.. and if you don't? :-) (have the signal processing toolbox)
Réponses (1)
Voir également
Catégories
En savoir plus sur Geology dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!