Search found 31 matches

by etc
Sat Apr 29, 2023 5:12 pm
Forum: Acquisition server and drivers
Topic: I need an information before to buy a Unicorn Hybrid!
Replies: 4
Views: 8050

Re: I need an information before to buy a Unicorn Hybrid!

Only today I read your answer!
Thank you very much!
by etc
Wed Mar 15, 2023 10:20 am
Forum: Designer
Topic: P300 Scenario: the sum of all the potentials for evey epoch
Replies: 2
Views: 5105

Re: P300 Scenario: the sum of all the potentials for evey epoch

Hi Thomas! You were very gentle to asnswer to my question! Sorry for my bad English and sorry for the large delay in my new answer! But I had the fever and I lost your answer. Sorry! The your solution is good! Because the average is useful for a my attempt. But it is only an attempt!!! In 2 words: i...
by etc
Wed Feb 08, 2023 4:20 pm
Forum: Designer
Topic: P300 Scenario: the sum of all the potentials for evey epoch
Replies: 2
Views: 5105

P300 Scenario: the sum of all the potentials for evey epoch

In the P300 Scenario I would like to calculate the sum of all the values (i.e.potentials) of all the channels of all the samples of every epoch.
One only number for every epoch.
Is it possible in some manners with the available Boxes?
Thank you very much!
Etc
by etc
Thu Dec 01, 2022 9:47 am
Forum: Boxes
Topic: Box: Stimulation based Epoching: select an epoch by the row or the column
Replies: 2
Views: 6091

Box: Stimulation based Epoching: select an epoch by the row or the column

P300 Speller: we have 6 rows and 6 columns. In the box Stimulation based epoching, is it possible to select an epoch only from one row or from one column using “Input stimulations”? And if yes, what is the name of the field that I have to used to get, for example, the column number 4? Thank you very...
by etc
Tue Nov 22, 2022 9:12 am
Forum: Acquisition server and drivers
Topic: I need an information before to buy a Unicorn Hybrid!
Replies: 4
Views: 8050

Re: I need an information before to buy a Unicorn Hybrid!

Thank you, Thomas!
Very Gentle!
Etc
ps do you know how can I contact Anton Andreev? Have you his email address at Gipsa-lab?
by etc
Fri Nov 18, 2022 10:25 am
Forum: Acquisition server and drivers
Topic: I need an information before to buy a Unicorn Hybrid!
Replies: 4
Views: 8050

I need an information before to buy a Unicorn Hybrid!

Sorry because I came back again about the connection between Openvibe and Unicorn Hybrid black! I need an information! I am an Openvibe user; I am going to buy a Unicorn Hybrid black. I will buy it only if it is possible to connect the Unicorn Hybrid black to Openvibe via a driver. In the Acquisitio...
by etc
Sat Mar 12, 2022 10:23 am
Forum: Scenarios and BCI design
Topic: p300 online: Epoch average after Stimulation based epoching
Replies: 0
Views: 21235

p300 online: Epoch average after Stimulation based epoching

In the P300 I think that the averaging is very very important: it is possible to extract the ERP (p300), whereas the activity that is not related to the stimulus onset is expected to be averaged out. Now, this is a good possibility in the scenarios Openvibe "training": we have the target epochs sepa...
by etc
Tue Apr 13, 2021 12:08 pm
Forum: Discussion about BCI and related topics
Topic: A question about the “Epoch averaging” in BCI P300
Replies: 2
Views: 6343

Re: A question about the “Epoch averaging” in BCI P300

Dear Thibaut,
thank you for you answer.
I am going to give a look to the input to the box Epoch average and to the output from the same box to understand how is made the average.
Thank you!
Ettore
by etc
Sat Apr 10, 2021 6:24 pm
Forum: Discussion about BCI and related topics
Topic: A question about the “Epoch averaging” in BCI P300
Replies: 2
Views: 6343

A question about the “Epoch averaging” in BCI P300

A question about the “Epoch averaging” in BCI P300. Sorry for my bad English! I suppose: 1) 250 hz, then I have a sample every 4 ms.; 2) 4 channels; 3) in “Stimulation based epoching” I set 0-0,4; 4) then, I have this matrix output from “Stimulation based epoching”: time0 ch1, time0 ch2, time0 ch3, ...
by etc
Thu Jan 07, 2021 1:28 pm
Forum: Discussion about BCI and related topics
Topic: Epoch duration
Replies: 4
Views: 7716

Re: Epoch duration

Thank you very much!!!
Ettore
by etc
Tue Jan 05, 2021 11:13 am
Forum: Tutorial scenarios
Topic: With the 3.0.0, in P300 Online or Replay, the selected characters are not showed
Replies: 3
Views: 7077

Re: With the 3.0.0, in P300 Online or Replay, the selected characters are not showed

Thank you!
They are the same scenarios (P300 speller and P300 speller Xdawn) with the same your datasets in input (training and online dataset, both with date 2016-04-20).
When you'll give a look, if I can help you, I can give to you other infomations about my tests to understand the problem.
Ettore
by etc
Tue Dec 22, 2020 12:48 pm
Forum: Tutorial scenarios
Topic: With the 3.0.0, in P300 Online or Replay, the selected characters are not showed
Replies: 3
Views: 7077

With the 3.0.0, in P300 Online or Replay, the selected characters are not showed

Sorry for the inconvenience! I know I asked many questions in the past, but now I have a very bad problem with the new version 3.0.0 (December 2020) ! I would work with the new version also because I would use the Artefact detection. The problem: the problem is the same working with P300 Speller or ...
by etc
Fri Dec 11, 2020 6:49 pm
Forum: Discussion about BCI and related topics
Topic: P300 accumulator- number of stimulations
Replies: 2
Views: 6895

Re: P300 accumulator- number of stimulations

Dear Fabien, thank you for your answer! 1) about the p300 accumulator, I am sure that if I indicate in the box Epoch Average the parameter Epoch Block Average with Epoch Count 2 or greater, the P300 accumulator doesn’t work. Because the number of epochs is less than the number of flashes and the Acc...
by etc
Sat Dec 05, 2020 12:43 pm
Forum: Discussion about BCI and related topics
Topic: P300 accumulator- number of stimulations
Replies: 2
Views: 6895

P300 accumulator- number of stimulations

Scenario BCI-P300 speller. New version 3.3.0, but it is the same with the old one. I gave a look to the P300 Accumulator code to try to understand the reason of a problem(the problem was that the results, i.e. the characters selected, were not showed). I read this note in the code: “-- the idea is t...