MATLAB: How to find the maximum values from each column 2 and 3 and find the corresponding values from column 1

maximum value

I have 543 .txt files with 3 columns. I need to find the maximum values for column 2 and 3 for each of these files and scatter plot the values. Then I have to find corresponding values from column 1 for those maximum values in Column 2 and 3 and again scatter plot those values. Please help. This is the code I wrote.
list=dir('*.txt'); 
for n=1:length(list)
    filename=list(n).name;
    filename_edit=strrep(filename,'.',';');
    part=textscan(filename_edit,'filename;%d;%d;%d;%d;%s');
    delimiterIn = ' ';
    A = importdata(filename,delimiterIn);
    Altitude = A(:,1);
    Digisonde = A(:,2);
    COSMIC = A(:,3);
    for i = 1:n
        if Altitude > 150,
        out1 = max(Digisonde);
        out2 = max(COSMIC);
        else 
        out3 = max(COSMIC);
        end
    end
    scatter(out1,out2,'filled')
    xlabel('Digisonde')
    ylabel('COSMIC')
end

Best Answer

 find corresponding values from column 1 for those maximum values in
 Column 2 and 3

This would be:

   [out1, index1] = max(Digisonde);
   alt1           = Altitude(index1);
   [out2, index2] = max(COSMIC);
   alt2           = Altitude(index2);
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