clean market value of a vanilla swap

Posted by kevinwang on Apr 08, 2009; 8:26pm
URL: http://quantlib.414.s1.nabble.com/clean-market-value-of-a-vanilla-swap-tp7273.html

Hi, I think the NPV() method on vanilla swaps returns the market value/net prevent value of both legs of the swap, including the pricipals and accrued interests. How can i get the clean market value ( principal) alone? it should just be NPV()- accured interest.

Thanks
Kevin