Search found 26 matches

by RobinWang
20 May 2013, 09:56
Forum: BCI Systems - User Applications
Topic: Roundtrip time approaches block duration
Replies: 1
Views: 2271

Roundtrip time approaches block duration

Hi, In my project, I use MatlabSignalProcessing, don't add any algorithm and make the output is constant, the system also can appear the problem Warning: DataIOFilter::Process: Roundtrip time approaches block duration(currently 96.39%) . But when I use ARSignalProcessing, the problem would not aris...
by RobinWang
20 Dec 2012, 21:26
Forum: Configuration
Topic: bci_StopRun error
Replies: 1
Views: 1641

bci_StopRun error

I am using MatlabSignalProcessing, and i have the error: Matlab function "bci_StopRun": Reference to non-existent field 'MyRunCount'.
I use the MATLAB Command Window and check the bci_Parameters, and i could not find 'MyRunCount'.
could the bci_StopRun.m be deleted?
by RobinWang
09 Dec 2012, 20:02
Forum: Software Development
Topic: Terminating SignalProcessing module
Replies: 11
Views: 7126

Re: Terminating SignalProcessing module

gschalk wrote:What version of Matlab?
Matlab:7.10.0 (R2010a)
by RobinWang
07 Dec 2012, 20:26
Forum: Software Development
Topic: Terminating SignalProcessing module
Replies: 11
Views: 7126

Re: Terminating SignalProcessing module

gschalk wrote:What version of Matlab are you using? What OS?

Gerv
I use 3.0.5 version of BCI2000.
OS: win7
by RobinWang
07 Dec 2012, 06:21
Forum: Software Development
Topic: Terminating SignalProcessing module
Replies: 11
Views: 7126

Terminating SignalProcessing module

Hi, I am using CursorTask and MatlabSignalProcessing,when I launch, MatlabFilter::Constructor: Unhandled Win32 exception 0xc0000005: ACCESS_VIOLATION occurs!
Could somebody help me fix this error?
by RobinWang
26 Apr 2012, 22:03
Forum: Configuration
Topic: About Neuroscan block size
Replies: 1
Views: 1682

About Neuroscan block size

Hi, I used NuAmps and neurogetparams.exe got the test.prm file. Now I have some question. I set the A/D Rate=1000Hz, then the block size=40. I load the test.prm and found the value of AlignChannels was -1, SourceChTimeOffset was 1.These parameters caused some errors. But when A/D Rate was set to 250...
by RobinWang
23 Apr 2012, 23:21
Forum: Configuration
Topic: DataIOFilter ERROR
Replies: 2
Views: 1742

Re: DataIOFilter ERROR

Thank you! In my project, Neuroscan Acquire is running on the same machine as BCI2000. Today I found the reason.
I clicked the Start button keep system running, then I wanted to monitor impedance and set Acquire to impedance mode, this error happened.

Regards,
Robin
by RobinWang
23 Apr 2012, 03:07
Forum: Configuration
Topic: DataIOFilter ERROR
Replies: 2
Views: 1742

DataIOFilter ERROR

Hi there, I followed the instructions at : http://www.bci2000.org/wiki/index.php/User_Tutorial:Obtaining_Mu_Rhythm_Parameters_in_an_Initial_Session . We used the NuAmps, and in our first try, the system worked successfully. But when we tried again, the system displayed an error after running normall...
by RobinWang
02 Mar 2012, 05:09
Forum: BCI Systems - Signal Processing
Topic: offline algorithms to online algorithms
Replies: 1
Views: 2121

offline algorithms to online algorithms

In some classification algorithms, we should calculate some thresholds. So before the algorithm was applied in online BCI system,Should we follow the online data processing for offline processing? For example, in offline program, if we want the data normalized , how many points we use? per blocksize...
by RobinWang
25 Feb 2012, 06:44
Forum: BCI Systems - User Applications
Topic: about online trial
Replies: 8
Views: 3728

Re: about online trial

Thanks for your answer . I appreciated you all.
by RobinWang
23 Feb 2012, 10:06
Forum: BCI Systems - User Applications
Topic: about online trial
Replies: 8
Views: 3728

Re: about online trial

sorry for wasting your time. My English is so terrible! I used the SignalGenerator to Generate bci2000 data file test1.dat. the function load_bcidat.m was used for loading test1.dat to matlab: [ signal, states, parameters ] = load_bcidat( test1.dat); so I thought the number of the sample equals the ...
by RobinWang
22 Feb 2012, 20:57
Forum: BCI Systems - User Applications
Topic: about online trial
Replies: 8
Views: 3728

Re: about online trial

I used the FeedbackDemo and didn't modify anything, SignalGenerator, and did one trial, then did twice, triple. used load_bcidat.m. then i found this problem. Even though FeedbackDuration decides the speed, but the CursorSpeedX was constant, I think this makes the cursor move from the edge of the le...
by RobinWang
22 Feb 2012, 05:21
Forum: BCI Systems - User Applications
Topic: about online trial
Replies: 8
Views: 3728

Re: about online trial

FeedbackDuration is not an exact parameter, it is only used to scale cursor speed. Actual trial duration will depend on whether the target has been hit or not. In my project I am using Fileplaback for testing new algorithms. I had modify the cursor speed as this: (WindowWidth-TargetWidth-CursorWidt...
by RobinWang
21 Feb 2012, 02:36
Forum: BCI Systems - User Applications
Topic: about online trial
Replies: 8
Views: 3728

about online trial

Hi, Now i have a new question,I use the SignalGenerator and FeedbackDemo to generator EEG data. Here is the Application parameter: PreRunDuration:0s. PreFeedbackDuration:2s. FeedbackDuration:6s. PostFeedbackDuration :1s. ITID:0s; the samplingrate is 128Hz. When the NumberOfTrials=1 the number of sam...
by RobinWang
15 Feb 2012, 08:31
Forum: BCI Systems - Signal Processing
Topic: about online trial
Replies: 2
Views: 2224

Re: about online trial

Thanks for your reply
there is a long holiday for my spring festival, so I am late, sorry