title: EEGLab: Number of ICA components
body: <p>I have an EEG acquired through 238 channels. When I decide to perform ICA, I have no idea about how many independent components I should obtain. If I have understood well, when I perform ICA the number of channels is equal to the number of independent components, so in my specific case I think I should have 238 components. </p>
  
  <p>In EEGLab toolbox, in the window appeared by click on <code>run ICA</code> command I set <code>runica</code> for the algorithm to use and 'extended', 1 , 'pca', 238  in command line options. </p>
  
  <p>Is it correct? Thanks to everyone. </p>
  
  <p>P.S. I have already read other answers on ICA, but I am a little bit confused.</p>