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

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KFrenkie
KFrenkie 2012-12-5
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

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Eric Keller
Eric Keller 2012-12-19
I would use 'resample'

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