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08-03-2012 10:51 AM
Hello everybody,
I'm opening EDF file (1 hour of recording of EEG signal from 16 channels) with OPEN DATA STOREGE instrument present in LabView and
it's ok I can open it and I can see on the graph. The only problem is that all the signal have the same offset. It's means that in the graph
I see the signal super imposed. I'd like to be able to decide the offset of everysingle channel (the number can change during the experiment).
By using matrix I did in the way i show you in the image below but with with EDF file it not possible becase if i try to "convert" the tipe of probe
to be able to use the matrix instrument the program say the file is to big.
Thank for helping me.
08-10-2012 02:07 AM - edited 08-10-2012 02:07 AM
Hi,
can you send your VI? From the posted image I am not able to completely understand the issue.
Regards,
A.
08-10-2012 04:54 AM
Hi,
here you can find two VI.
The first one (Off-Set signal1) is what I created to work directly with EDF file.
In the second one I used the array to set the offset.
As you can see the secon solution is easyer but unfurtunately I cannot use it with all my file.
I need to use directly the EDF format (blue line). Can you figure out a better method to
set the offset directly in edf signal?
thank you.
08-10-2012 08:15 AM
Hi,
try working on multiple y-scale, directly on the graph. You can do this editing the front panel graph object or programmatically from the block diagram
Please see attached images
Regards
A
08-10-2012 08:39 AM
Thank for replying, but in my LabView I have no way to select multiple amplitude
for the Y axis. I'm using LabView 2010. Do you know if I need an upgrade to use that function?
Best
G.
08-10-2012 08:41 AM
Sorry....I think i find what you suggest....wonderful.
Thank you again........
08-10-2012 09:24 AM
Hi there...sorry...again me.
I was wrong...even if i can duplicate the Y scale i cannot follow the next step you suggest me.
If I right clic directly on the graph the Y scale option is not avaible (it's there but I cannot clic on).
if I change the off set of the graph property pannel it's seem nothing happen. I think the offset is modify put the
signal on the graph are still not separeted.
08-10-2012 09:39 AM