title: Plotting a sound signal
body: <p>I have a sound file, which I'll call sndfile.wav.
  So far I have determined the number of samples, sampling rating, and the length in seconds.</p>
  
  <pre><code>[f,Fs] = wavread('mike.wav');
  N = length(f);
  slength = N/Fs;
  </code></pre>
  
  <p>Given that f is the vector containing the samples from the sound file, Fs is the sampling rate, N is the number of samples, and slength is the length of the sound file in seconds, how can I plot the sound signal with respect to time in seconds.</p>