extract every tenth row from a long text file with 3 column

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

Answer 1

[Image Analyst]

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

[Akim Mahmud]

thanks