Synchronizing 4 signals with 4 different measurefre​quencies/t​imeinterva​ls

Dear Matlabusers,

I have 5 medical devices that measures 5 different kinds of biosignals (NIRS, EMG, ECG, FORCE, ANGULAR DISPLACEMENT)

EMG has a samplerate of 1250 Hz
ANGULAR DISPLACEMENT measures per 2 degrees displacement and records that time in 1/100 second. so max 100 Hz. (Force same device)
NIRS 8 Hz per second

Well, let's take the EMG-device as time-standard.

Now I want to synchronise them with the time so I want a dataset something like

Time      EMG         Angular displacement   Force
0         0.15312     0                      0
0.0004    0.15214     0                      0
0.0008    0.13459     0                      0
...
0.0100    0.26843     2                      15
0.0104    0.21684     2                      15
0.0108    0.21665     2                      15
0.0112    0.21846     2                      15
...
0.0200    0.35331     4                      22
0.0204    0.35135     4                      22
0.0208    0.35351     4                      22
etc.

So i want the data of for example force to stay the same in the interval period it didn't measure (so I already have the data, not realtime) Force for example is:

0.00    0
0.01    15
0.02    22
0.03    25
0.04    28

I hope you understand what I mean :)!

I already coded the whole program for inserting the data, filtering etc. The syncing part is my only problem to complete this pilotstudy-program

Greetings and thanks in advance,

Martijn van Hooff

[KFrenkie]

Can somebody help me?

Answer 1

[Eric Keller]

I would use 'resample'