Dear all,<br><br>When applying fastICA algorithm in Matlab to a data consisting of 4 signals, I have noticed that only when I choose 4 IC to be estimated, the formula A*icasig =X actually works. After choosing 2 or 3 IC the data (X) is reconstructed imprecisely. <br>
Could you explain why? I wish to understand the methods fully.<br><br>Thank you in advance,<br>Ewa<br>PhD student from Cracow<br>