Matlab plotting and breathing rate

Kindly, trying to plot, find breathing pattern analysis and use of wavelet transform.

[Star Strider]

You need to supply many more details.

1. What are you doing? Be specific.
2. What are the variables in your files?
3. What do you want to plot?

[Star Strider]

You need to ask ‘them’ about the wavelet analysis, and anything else you have questions about.

I have no idea what your data are. Flow? Pressure? Something else?

What information do you expect to get from the wavelet decomposition?

The plots are straightforward, and the code you posted will plot them correctly.

[Star Strider]

@Michael Angelo Fernandez —

Please do not Close Questions that have Answers.

[Michael Angelo Fernandez]

Thanks! I was able to figure out a way to determine breathes/minute using Pwelch function.

[Star Strider]

As always, my pleasure!

There are several methods to find the rates in simple waveforms such as yours, including the Fourier transform, the findpeaks function, and others.

[Dr Sreelatha P]

Good data set , what do the values in column 2 & 4 correspond to?

[Dr Sreelatha P]

Can you also share the source of these files

[Michael Angelo Fernandez]

If I remember correctly, the columns 2 and 4 are the values of change in distances (cm). We used a linear actuator to simulate a human breathing pattern and used a doppler radar to acquire those data. We directly acquired the files from the data acquisition device.

Answer 1

[Star Strider]

To calculate and plot the continuous wavelet transform of your signal, use the cwt (link) function.

Specifically:

Mn = dlmread('Normal_Breathing.txt', '\t', 2, 0);
Fs = 100;

figure
cwt(Mn(:,2), Fs)                                            % Continuous Wavelet Transform Of ‘Column 2’

Since this is your research, I leave the rest to you.