how to read specific rows in multiple text files and store them into an matrix?

fileNames = dir('---\C1*.txt');

Tmatrix = zeros(TraceCount,T);

 for i=1:TraceCount  
     file2read = fileNames(i).name;
     fid = fopen('file2read', 'r');
     Tmatrix(i,:)= textscan(fid, '%f', -----);
     fclose(fid);
 end

[Paolo]

Can you attach a sample text file?

[js rathore]

my text files are having only one column each (with floating point values). i want to read 10 to 100 rows from each file and store them into Tmatrix. its showing error.pls help

[Paolo]

What error are you getting? Is there perhaps a line missing in your code?

 TraceCount = numel(fileNames)

And what value is T? You can attach the file with the paperclip button.

[Adam Danz]

Here's a demo using textscan which extracts rows 2,4,6 from the attached txt file that is formatted according to your description.

But try the answer below that uses fscanf() as that method may be most suitable.

fid = fopen('fakedata.txt'); 
t = textscan(fid, '%f');
fclose(fid);

% read lines [2,4,6]
store = t{:}([2,4,6]);

Answer 1

[OCDER]

Since each txt file has a single column of numbers, you could use fscanf:

FileNames = dir(fullfile(pwd, '**\C1*txt'));
FileNames = fullfile({FileNames.folder}, {FileNames.name});
GetLines = [10 100]; %want lines 10 to 100
Nums = cell(1, length(FileNames));
for j = 1:length(FileNames)
   FID = fopen(FileNames{j});
   fscanf(FID, '%f', GetLines(1)-1); %Skips the 1-9 lines
   Nums{j} = fscanf(FID, '%f', diff(GetLines)+1); %Reads the 10-100 lines
   fclose(FID);
end
Nums = horzcat(Nums{:}); %Puts it all together into a single 91xlength(FilesNames) matrix