Search found 1097 matches

by mellinger
30 Mar 2020, 08:38
Forum: Software Development
Topic: System Latency using AmpServer and E-Prime
Replies: 2
Views: 7

Re: System Latency using AmpServer and E-Prime

Hi Emanuel, there is some information about BCI2000 system timing here: https://www.bci2000.org/mediawiki/index.php/User_Reference:Timing BCI2000 tries to obtain information about system timing as far as it can. Its software perspective is limited, however. To measure the latency between E-prime's t...
by mellinger
25 Mar 2020, 11:12
Forum: BCI Systems - Signal Processing
Topic: References
Replies: 1
Views: 10

Re: References

Hi, the REST method is based on a head model and an associated lead field matrix. Lead field matrices differ depending on the reference that is used. In order to transform the signal from one reference to the other, first multiply with the pseudoinverse of the actual lead field, and then multiply wi...
by mellinger
06 Mar 2020, 09:24
Forum: BCI Systems - User Applications
Topic: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions
Replies: 34
Views: 415

Re: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions

For example, I went line by line in the GUI to see what was typed in AR Order, Buffer Length, etc and made sure everything matched up to the parameter file I posted and found that was posted by Peter. The program seemed to run normally. Peter posted those parameters so you could paste them into an ...
by mellinger
05 Mar 2020, 07:04
Forum: BCI Systems - User Applications
Topic: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions
Replies: 34
Views: 415

Re: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions

I meant to say that when I use Basket Task .prm directly and load it, I do not get the task shown in the wiki. Instead, I get a ball that starts in the middle of the screen that moves vertically (Which is good), but I then get a grey square that appears randomly across the screen too. But when I us...
by mellinger
04 Mar 2020, 06:27
Forum: BCI Systems - User Applications
Topic: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions
Replies: 34
Views: 415

Re: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions

We do not use basket_Task.prm directly. We copied its parameters only. I don't understand. Please explain. Do you have a preference for a certain power computing method in the Spectral Signal Processing module or do you think AR is good for now? AR should be fine for now. Please note that the defau...
by mellinger
03 Mar 2020, 04:19
Forum: BCI Systems - User Applications
Topic: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions
Replies: 34
Views: 415

Re: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions

We were able to run cMake without errors this time and after running Visual studio,we got all of the .exe files except for a few, including cursor task. Here is the error (I got this for other .exe but am just showing it for Cursor): I am confused. It seems you got the .exe files, so there was no l...
by mellinger
02 Mar 2020, 06:21
Forum: BCI Systems - User Applications
Topic: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions
Replies: 34
Views: 415

Re: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions

Your screenshot does not show a CMake error but a CMake warning. The instructions tell you to install Qt and to define a CMake variable Qt5_DIR that points to your Qt installation. If this is done correctly, as described in the instructions, CMake will recognize Qt, and CursorTask will be built. -Ju...
by mellinger
29 Feb 2020, 06:59
Forum: BCI Systems - User Applications
Topic: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions
Replies: 34
Views: 415

Re: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions

I will keep working on it until cmake stops giving us an error after I press "configure". If the error message is about files that could not be found, make sure to repeat "SVN update" on the BCI2000 source folder until the operation results in success rather than failure. Sometimes the source downl...
by mellinger
28 Feb 2020, 08:49
Forum: BCI Systems - User Applications
Topic: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions
Replies: 34
Views: 415

Re: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions

My question is: What even is the parameter file we should use for the cursor task when there are two versions Previously, you stated that you were following the mu rhythm tutorial on the wiki. That tutorial uses the "basket task" configuration file. Why are you referring to a different parameter fi...
by mellinger
27 Feb 2020, 11:08
Forum: BCI Systems - User Applications
Topic: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions
Replies: 34
Views: 415

Re: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions

1) In the case of Mu, how exactly does the ball move? As you suggest, movement upward means a more-than-average amplitude of the mu rhythm at the selected electrode and frequency. If one wants to increase Theta power, could we just have a program where the ball just moves upwards to a target from t...
by mellinger
24 Feb 2020, 10:12
Forum: Data Analysis
Topic: What being fed into the SWLDA
Replies: 5
Views: 91

Re: What being fed into the SWLDA

Sorry, I accidentally misrepresented the "p" in "Fp1"/"Fp2". Of course you need the parietal electrodes.
And yes, in frontal electrodes you have noise from eyes and muscles, that's why I suggested to exclude them.

I'm editing the above post to make sure nobody is misguided by my mistake.

-Juergen
by mellinger
20 Feb 2020, 09:11
Forum: BCI Systems - User Applications
Topic: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions
Replies: 34
Views: 415

Re: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions

Finally, when your code was added, the program ran automatically for some time and then stopped. A button called "resume" showed. After clicking "resume" (One of the three module options besides Config and Set Config), is this when adaptation was off? After we hit "resume" and ran the program, we w...
by mellinger
19 Feb 2020, 09:37
Forum: BCI Systems - User Applications
Topic: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions
Replies: 34
Views: 415

Re: A Theta Power Band Controlled 1D Cursor Task-Parameter Questions

What modifications would you suggest for the spatial filter? Should it be set to CAR for now? Yes. Finally, would you be able to help us code turning off adaptation after 1 minute of the BCI cursor task? In your batch file, add the following after parameters have been loaded: set parameter MinRunLe...
by mellinger
18 Feb 2020, 08:06
Forum: Software Development
Topic: Newbie Question EEG Marking
Replies: 1
Views: 36

Re: Newbie Question EEG Marking

The value of the "StimulusCode" state (marker) contains the information about which stimulus was presented. The number refers to the column in the Stimuli parameter. For more information about the StimulusPresentation module, see this page: https://www.bci2000.org/mediawiki/index.php/User_Reference:...