Lost data using LSL and Matlab?

aladdin · February 2018

Hello,

I want to stream raw data from my Ganglion board to Matlab using LSL. I successfully run the python code to stream data via LSL and I pull this data using the library in Matlab. However, there seems to be some kind of data loss or an inconsistent sampling rate (see pictures). I created a 10Hz sine wave using a waveform generator. First picture is what I get using LSL and Matlab. Second picture is data recorded using OpenBCI GUI. Any ideas on what could be happening? Thanks!!

LSL + Matlab:

Recording in OpenBCI GUI:

pushtheworld · March 2018

@aladdin

First picture is what I get using LSL and Matlab. Second picture is data
recorded using OpenBCI GUI. Any ideas on what could be happening?
Thanks!!

Jeeze something bad is happening it looks like for sure

I wonder what the issue is...

What example are you using to read data in Matlab?

aladdin · March 2018

I was using the example code ReceiveData.m available on the GitHub page of LSL for Matlab. I switched to using UDP streaming directly from OpenBCI GUI because python and LSL was giving me too many problems...

pushtheworld · March 2018

UDP to matlab?

aladdin · March 2018

Yes

pushtheworld · March 2018

Share code? I didnt know that was a thing

aladdin · March 2018

I just used this:

https://www.mathworks.com/help/instrument/udp.html

Lost data using LSL and Matlab?

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