MATLAB: Extract every tenth row from a long text file with 3 column

looptext file

Hi I have a big text file with like 1000000 rows and 3 column and I imported using the importdata function. Now I want to extract/read only every 10th row from the file using a loop. Any help ? Thanks

Best Answer

You forgot to attach the file, but basically I'm guessing you'd do:
data = importdata(filename);
% Non-loop way:
data10 = data(1:10:end, :);
% Loop way
[rows, columns] = size(data);
data10 = zeros(ceil(rows/10), columns);
thisRow = 1;
for row = 1 : 10 : rows
    data10(thisRow, :) = data(row, :);
    thisRow = thisRow + 1;
end
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