Re: Octave support?
Posted: Sat Jun 20, 2020 11:25 pm
5.2 on Windows, and 4.2.2 on Ubuntu.
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Re: Octave support?
Posted: Sat Jun 20, 2020 11:27 pm
It's working for you on windows yes? Can you try updating the Ubuntu one to the lastest version.
Re: Octave support?
Posted: Sat Jun 20, 2020 11:55 pm
Same problem on windows 
Will meditate with Mind Monitor
and get back to you later ...
Thank you for the great tool.
Will meditate with Mind Monitor
and get back to you later ...Thank you for the great tool.
Re: Octave support?
Posted: Sun Jun 21, 2020 12:04 am
Check the data. Maybe the plot function isn't working for you.. but I'm baffled as to why since it works just fine on my machine and I have a professor who tested the script and said it's working for his students.
Re: Octave support?
Posted: Sun Jun 21, 2020 12:09 am
Played with code a bit more and changed to csv2cell function. Now it works (and I can meditate).
Will reinstall my Octave anyway.
Code: Select all
pkg load io
museData = csv2cell(tempDataFilename);
delete(tempElementsFilename);
delete(tempDataFilename);
figure
hold on;
#dateFormat = 'yyyy-mm-dd HH:MM:SS.FFF';
#dateNums = datenum(museData(:,1},dateFormat);
museData = cell2mat( museData(2:end,2:30) );
plot((museData(:,1)+museData(:,2)+museData(:,3)+museData(:,4))/4,'Color',[0.8,0,0]);#Delta
plot((museData(:,5)+museData(:,6)+museData(:,7)+museData(:,8))/4,'Color',[0.6,0.2,0.8]);#Theta
plot((museData(:,17)+museData(:,10)+museData(:,11)+museData(:,12))/4,'Color',[0,0.6,0.8]);#Alpha
plot((museData(:,13)+museData(:,14)+museData(:,15)+museData(:,16))/4,'Color',[0.4,0.6,0]);#Beta
plot((museData(:,17)+museData(:,18)+museData(:,19)+museData(:,20))/4,'Color',[1,0.54,0]);#Gamma
title('Mind Monitor - Absolute Brain Waves');
hold off;
Re: Octave support?
Posted: Tue Jun 23, 2020 10:22 pm
Hi James, I was also trying to convert the values plotted in Matlab/Octave to dB. Since you mentioned these values are already in Bel, to change to dB, I should multiply them by 10, and I can add any common offset to these values. However the resulting dB values have a smaller range than that of your online graph. For example, I got between 50~60 dB, but with the same data your online tool shows 40~80 dB. Could you please let me know how you did the conversion? Thank you.
Re: Octave support?
Posted: Tue Jun 23, 2020 10:34 pm
You don't need to convert the values. I changed the rendering scale from the data's ~-1:+1 scale to ~0:100 because the laymen understands it better without question, but there's really no need to. You can call them bels or dB, it doesn't matter, it just a unit that designates that they are values derived from logarithmic calculation. If you want to convert from -1:+1 to 0:100 then y=x+1*0.5
Re: Octave support?
Posted: Wed Jun 24, 2020 12:36 am
I got your point. Thank you.
Then how did you compute the relative fraction for each type? Did you sum up the values directly or convert them from the log domain back to linear domain (10^value) and then sum up?
Then how did you compute the relative fraction for each type? Did you sum up the values directly or convert them from the log domain back to linear domain (10^value) and then sum up?
Re: Octave support?
Posted: Wed Jun 24, 2020 1:35 am
That math is done by the Interaxon SDK. According to their documentation (https://mind-monitor.com/OnlineHelp.php ... and_powers) it's the "logarithm of the sum of the Power Spectral Density of the EEG data over that frequency range"
Re: Octave support?
Posted: Thu Jun 25, 2020 11:52 am
Very helpful. Thank you