Hi. There a text file with many lines and my professor asked me to extract from this text file in a matrix just the lines which contains the word GPS10.he suggested me use fgetl and while lope. Could you please help me?

filename=uigetfile;
fid=fopen('sp3data.txt');

Answer 1

[KSSV]

    fid = fopen('sp3data.txt');
    tline = fgetl(fid);
    while ischar(tline)
        disp(tline)
        tline = fgetl(fid)
    end
    fclose(fid);

Read about contains , strcmp, strfind etc..to check whether your desired string is present in the line...and save them .

[gblmtc]

Thanks KSSV! I used the code , it works but what I need are just the lines with the word PG10. Please have a look on the file.