Removing lines/rows containing 0.00... in the final column of a .txt file - MATLAB

Hi,

I'm currently writing large data-sets to .txt files proceeding smoothing values with MATLAB using the commands:

    hann500=hanning(500);
    yy=conv(y,hann500,'same');
    fileID = fopen('chrI500bp.txt','w');
    for i = 1:length(x)
    fprintf(fileID,'%s\t%d\t%d\t%f\n', 'chrI', x(i),x(i),yy(i));
    end
    fclose(fileID);

Is there a way I can get MATLAB to process the .txt file after creating it to remove all lines containing null-values (0.000....) in the final column (such as those shown below)?

    chrI  1983  1983  0.000000
    chrI  1984  1984  0.000000
    chrI  1985  1985  0.000000
    chrI  1986  1986  0.000000
    chrI  1987  1987  0.000000
    chrI  1988  1988  0.000000
    chrI  1989  1989  0.000000
    chrI  1990  1990  0.000000
    chrI  1991  1991  0.000000
    chrI  1992  1992  0.000039
    chrI  1993  1993  0.000157
    chrI  1994  1994  0.000354
    chrI  1995  1995  0.000629
    chrI  1996  1996  0.000983
    chrI  1997  1997  0.001415
    chrI  1998  1998  0.001925
    chrI  1999  1999  0.002514

Thanks!

- TJC

Answer 1

[Azzi Abdelmalek]

A={ 'chrI'  1983  1983  0.000000
    'chrI'  1984  1984  0.000000
    'chrI'  1985  1985  0.000000
    'chrI'  1992  1992  0.000039
    'chrI'  1993  1993  0.000157}
out=A(~~cell2mat(A(:,4)),:)