MATLAB: How can i read second column from a txt file in matlab

txt files in matlab

here is the link of the file.

https://www.physionet.org/atm/mitdb/100/atr/0/10/rdann/annotations.txt

Best Answer

[Filename,FilePath]=uigetfile('\\Address\*.txt','Load File');
FileName=fullfile(FilePath,Filename);
NoofCol=7;% Total no of col. in ur file 
Format=repmat('%s',1,NoofCol);
fid=fopen(FileName,'rt');
Header=fgetl(fid);% to delete first line (You can use this line as title for data plotting)
data_cell=textscan(fid,Format,'HeaderLines',1,'CollectOutput',1);
fclose(fid);
data=data_cell{1};
SecCol=str2double(data(:,2));

Hope the above will help you

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The best solution is probably to read your entire file as text, then remove the header lines, then parse them with textscan.

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One way would be the following:

 fid_in  = fopen('inFile.txt', 'r') ;
 fid_out = fopen('outFile.txt', 'w') ;
 cnt = 0 ;
 while ~feof(fid_in)
    if cnt == 7,  cnt = 1 ;  else  cnt = cnt + 1 ;  end
    fprintf(fid_out, '%s %d\r\n', fgetl(fid_in), cnt) ;
 end
 fclose(fid_in) ;
 fclose(fid_out) ;

Best Answer

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