<div>I tried to plugin the observer like regular step gradient descent optimizer, but it was never called for the internal iterations. Is this a bug or a restraint for this algorithm?</div>
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<div>I was also trying to trace the code, and there is a provision of preconditioning in which {<font size="2">vnl_conjugate_gradient::preconditioner_} function is called. probably my guess is the observer can be linked in here.
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<div>any help / guidelines will be highly appreciated.</div>
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<div>with regards,</div>
<div>Ashish.<br><br>-- <br>Ashish Poddar<br>Have an acceptable reason for accepting anything.<br>Y:ashish_poddar | <a href="mailto:MSN:ashish_poddar@yahoo.com">MSN:ashish_poddar@yahoo.com</a> </div>