Thanks. I also wanted to denise the FFT results based on it. However they are computed on a period of time (for example 4 sec) instead of on the timestamp where the outlier is, in this case, what should I do? Thanks a lot!
Search found 12 matches
- Fri May 10, 2019 1:30 pm
- Forum: Mind Monitor
- Topic: Preprocessing raw data
- Replies: 11
- Views: 22493
- Fri May 10, 2019 11:33 am
- Forum: Mind Monitor
- Topic: Preprocessing raw data
- Replies: 11
- Views: 22493
Re: Preprocessing raw data
Hi James, since the voltage of raw EEG signal usually lies between 850+-100uV, I see a lot of outliers due to lack of contact of sensors during the tests. Do you think I can remove some noise by deleting everything out of this range?
- Mon May 06, 2019 8:55 pm
- Forum: Mind Monitor
- Topic: Preprocessing raw data
- Replies: 11
- Views: 22493
Re: Preprocessing raw data
The bottom left graph is the average of the left and the average of the right for each band over the entire session. If you click on a specific point on the graph, you will get another graph shown under it showing just that point in time. The left side is always negative so that it renders correctl...
- Sun May 05, 2019 2:11 pm
- Forum: Mind Monitor
- Topic: Preprocessing raw data
- Replies: 11
- Views: 22493
Re: Preprocessing raw data
All I can tell from this is that the subject wasn't relaxed. Sorry, like I said, my personal research is on relaxation! Regarding symmetry, the little graph in the bottom left, shows the left vs right power for each wave. In this example you can see it was more left than right. If you hover your mo...
- Sat May 04, 2019 11:01 pm
- Forum: Mind Monitor
- Topic: Preprocessing raw data
- Replies: 11
- Views: 22493
Re: Preprocessing raw data
1 - I don't. It's done automatically by the Interaxon SDK before my code gets the values. I believe they are removing blinks and power line interference. 2 - I'm not sure sorry. My personal research has been focused on relaxation. Thanks for your reply, I've read many articles on how brain works, a...
- Fri May 03, 2019 3:47 am
- Forum: Mind Monitor
- Topic: Preprocessing raw data
- Replies: 11
- Views: 22493
Preprocessing raw data
Hi, I really like your app thanks! I'm some questions: 1. how do you preprocessing the data to remove the artefacts? 2. if I have a piece of recorded data and I want to know if the person is in a highly nervous/frightened state, should I compute the average value of all 4 electrodes for Beta band or...
- Thu Apr 18, 2019 3:09 pm
- Forum: Mind Monitor
- Topic: How to calculate frontal asymmetry
- Replies: 4
- Views: 3034
Re: How to calculate frontal asymmetry
Thank you very much!
- Thu Apr 18, 2019 12:32 pm
- Forum: Mind Monitor
- Topic: How to calculate frontal asymmetry
- Replies: 4
- Views: 3034
Re: How to calculate frontal asymmetry
Thank you for your reply. If I do (x+1)x50, does it make it in db unit? If so, then there is no need to do log, subtraction will do the work.
- Wed Apr 17, 2019 10:03 pm
- Forum: Mind Monitor
- Topic: How to calculate frontal asymmetry
- Replies: 4
- Views: 3034
How to calculate frontal asymmetry
Hi I want to calculate frontal asymmetry from the AF7 and AF8 electrodes. I see the in the output csv files there are Alpha_AF7 and Alpha_AF8. I need to compute log(AF8 value/AF7 value) but I see lots of values in the csv file are negative (usually between -1 and 1), which doesn't allow me to comput...
- Tue Feb 19, 2019 9:16 am
- Forum: Mind Monitor
- Topic: How to process the raw data for ERP analysis?
- Replies: 3
- Views: 2295
Re: How to process the raw data for ERP analysis?
Thanks. Is there any tool to do a bandpass filter to the muse monitor csv file?