How to store data in a matrix, but not to overwrite values

I want to save the results of a for loop into a matrix, but the results are always getting overwritten,so only the last value is written. I want to save variable seg1 into a matrix. How can I do it? (This code is splitting audio signal into segments). I tried with this code:

      [data,Fs] = audioread('sz08010103404.wav');
      list = fopen('intervals.txt','r');
      C=cell(size(list)) 

      %split the signal
      N = length(data);
      totaldur = N/Fs; % total duration
      t = linspace(0,totaldur,N); % create a time vector

      for k=1:length(list)
          content = fgets(list(k)) 
          d= strsplit(content,',')

          for n=1:length(d) %d contains 25 elements
              y=d{n} 
              z= strsplit(y,' ') 
              start=z{1} 
              stop=z{2} 
              start1 = str2num(start)
              stop1 = str2num(stop)

                seg1 = data(t>start1 & t<stop1)
                sound(seg1)

              A=[seg1] %output needs to go here
        end

end

Answer 1

[Walter Roberson]

A{k} = seg1;