Raw Data File
fafapv
New Jersey
Hi,
I am new to openBCI and just want to confirm a few things about the raw data file that the gui outputs. I am using a Cyton + Daisy with the Ultracortex IV for 16 channels of data. I am currently using MATLab to analyze the data.
1. The first column appears to be an index counting from 0 - 127. My initial instinct was to say that this means the sampling rate is 128 Hz but the description at the top of the file says it is 125 HZ. Which of these is the correct sampling rate?
There are then 16 columns of channel data. Is it correct to say that they increase from 1 to 16 or is there another order?
I have two RAILED channels at nodes O1 and O2. They map to channel 7 and 8 on the GUI. I've tried adjusting the headset to make better contact but that didn't work. Any suggestions for how to fix this?
Thanks,
Josh
Comments
Please be aware that GUI v5 completely changes the CSV file output, and there are labels in the header describing what each value is.
The sample counter does not count the sample rate. The sample rate is clearly stated in the CSV header.
Sorry, is GUI v5 already released? If not when will it be coming out? The update button in my GUI doesn't link to a page.
https://openbci.com/index.php/downloads
https://openbci.com/forum/index.php?p=/discussion/1481/how-to-become-de-railed
The update button does work when a new version is available. You can also hover over the update button to see current version vs local version.
Ok thanks, does updating to GUI v5 require deleting the previous GUI version in its entirety?
You can keep both standalone versions! Just rename them
When going back and forth between versions, the GUI will likely remove the settings files and load Default settings. The settings files are what allow you to start up the GUI and it looks like your last session. These are automatically saved again when you close the GUI or stop a session.
Perfect. Thanks again for the help!