How to read EDF files in LabVIEW?

[clausny]

Hi all.

I'm trying to read a EDF file (brain signals, EEG) into LabVIEW but I can't figure out how to do it. Would like to meet this challenge without converting the EDF file before processing. 

Are there someone out there who can help me? I'm using LabVIEW 2010

Kind regards

[Jamie_S.]

Hi Clausny,

LabVIEW supports numerous data types through DataPlugins available here (login may be required), this includes the *.EDF (European Data Format).

Supported Features:

• EDF (European Data Format) files. 
• EDF+ files.
• Large blocked data files.
• Writing of EDF files.
  • All channels are saved into one channel group.
  • Saving of all numeric and waveform channels.
  • All channels must have the same channel length and the same "Waveform x-step width" property value.
  • "Waveform x-name" and "Waveform x-unit" properties will be ignored when writing to EDF file.

Non-Supported Features:

• Annotations. Those will be supported in a later version.

The EDF DataPlugin also integrates into the NI Biomedical Startup Kit. The Biomedical Startup Kit uses the LabVIEW graphical development environment to analyze biomedical signals.

Also the link here gives a brief introduction on how to use DataPlugins with your version of LabVIEW.

Hope this helps with your application.

Thanks

Jamie

[clausny]

Ok thanks.

Actually I tried the DataPlugin solution before I maid this post but it wouldn't work with the EDF files. And it still won't work but it runs perfectly with the EDF+ files. Do you have a solution for this problem?

 - Clausny

[Jamie_S.]

Hi Clausny,

Are you getting any error messages from your LabVIEW program? Also did you try installing the NI Biomedical Startup Kit available here (login may be required)? Although I understand you would rather not convert the *.EDF files it may be worth converting it to *.TDMS and try reading in the data that way to verify the operation of your program.

Thanks again.

Jamie

[usac]

Hi!

Since September 26, 2011 there is a new version of the EDF DataPlugin online:

http://zone.ni.com/devzone/cda/epd/p/id/2642

If you used the previous version, you may want to give it a try for your EDF files.

Major changes are:

- Support writing

- Changed from VBS to C++ DataPlugin

Greetings,

Uwe

[clausny]

Hi

Thanks for mention. I have now tried with the new DataPlugin version. It can still not read the EDF files but it works fine with the EDF+. It would be really nice if someone could help me with this problem and tell me what to do.

Thanks

Clausny

[StefanR]

Hi Clausny,

can you please provide an example file e.g. by putting it to

ftp://ftp.ni.com/incoming/

(Files posted there can only be accessed from inside NI)

You can also send it to

dataplugins@ni.com

[clausny]

All right.

Should I post both the EDF file and my VI?

[PiMaster]

EDF!  EDF!

[clausny · Accepted solution]

Hi All.

Thank you for your help. It finally works now!!

I tried to uninstalled and then reinstalled the edf DataPlugin file. And now it works great, both the EDF+ and EDF.

 - Clausny.