How to take Average of many waves to single wave(want he averge of all waves to a single wave)

Hello Everyone, I have a doubt concerning the average of the wave from a set of waves from sinlge dataset. I need to get a single average cuurve from of all the curves of the figure. I am new to matlab and have not been able to do so for a long time. I need you to help and it would be great for me. Thanks in advance.

[Lokeswara reddy pamulapate]

Please help me

Answer 1

[Star Strider]

Used the islocalmin function to find the minima of the waveform, then use those indices to store the wave segments in a cell array. Then use the shortest wave independent variable indices to take the mean of all of them. (This is known as an ensemble average.)

See: cutting up the signal into repeating parts for an illustrative example.

[Lokeswara reddy pamulapate]

error:

Index in position 2 exceeds array bounds (must not exceed 1).

I am getting this error. I have .mat file.

[Star Strider]

Vectors ‘b’ and ‘tv’ are each (4000x1) column vectors. The column addressed as ‘b(:,2)’ does not exist.

The time vector ‘tv’ in that Question was the first column of a two-column matrix, and the signal vector ‘ap’ was the second column. It is not absolutely necessary to have a time vector to use my code (although it is helpful), the signal vector ‘ap’ is all that is needed. If you do not have a time vector (and you do not want to create one from the sampling frequency and vector length), simply eliminate all references to ‘tv’ in that example.

[Lokeswara reddy pamulapate]

I tried to figure it out. I dont know wheather I got the rght output or not. Actually the data is medical data of radial arterial blood pressure of one patient with many cycles in it.

[Star Strider]

I picked up the .mat file from your other Question, and posted an Answer there.

I needed to change the code slightly from my previous Answer (to the post I referenced) to work with your data.

[Simon Green]

I am trying to do something similar with respiratory data and this is a very helpful start. Cheers.

[Star Strider]

Thank you!