Could you please give me an explanation on this code? (could it be rewritten in analyzer Software (EEG Data analysis)?

cd c:\matlab

clear all
close all
files = dir(fullfile('C:\matlab\newNotchICA\MAX', '*.dat'));

cd C:\matlab\newNotchICA\MAX
k=1

fid = fopen(files(k).name);
re = regexp( files(k).name,'_','split');
dataI={0};

fmt= ['%s' repmat('%f', 1,65)];

dataI=  textscan(fid,fmt, 'HeaderLines',1);
dataI= cell2mat(dataI (3:64));
fclose(fid);

filesmin = dir(fullfile('C:\matlab\newNotchICA\MIN', '*.dat'));
cd C:\matlab\newNotchICA\MIN

l=k

      fidmin = fopen(filesmin(l).name);
      remin = regexp(filesmin(l).name,'_','split');
      datamin={0};

      fmtmin= ['%s' repmat('%f', 1,65)];
      datamin= textscan(fidmin,fmtmin, 'HeaderLines',1);
      datamin= cell2mat(datamin (3:64));
      fclose(fidmin);

      dif=dataI+datamin*-1

      dif2=vertcat(dif, 0:61)

      a=dif2
      a' 

      b=sortrows(a')
      b'
      re

      cd c:\matlab

Answer 1

[Walter Roberson]

It finds all .dat files in C:\matlab\newNotchICA\MAX. For the first one (alphabetically), it reads the file and extracts columns 3 to 64 of all rows except the first one. It also looks in C:\matlab\newNotchICA\MIN and finds all the .dat files there. For the first one (alphabetically), it reads the file and extracts column 3 to 64 of all rows except the first one. It subtracts the matrix of the second set of values from the matrix of the first set of values. Underneath that it puts 0 through 61 and sorts the result by columns (which it does by making the columns into rows, sorting the rows, and making the result back into columns). It displays various of the results along the way.

The indentation of the code suggests that at some point the code looped through all of the files in the MAX directory and probably read the corresponding file of the MIN directory to do the subtraction. However, logically it should try to test that it reads the correct corresponding file in the MIN directory and it does not do that test.

[Platon Braun]

thanx a lot Walter.

I'm just trying to learn how to analyze EEG data. All steps except this one are written in analyzer software. on the long term I am going to do everything in matlab, i think it really is the best way, but for now i am just trying to uderstand the pathways.

best regards and nice hollidays, Platon