R help - Jan 2006 - question about density estimation with monotonic constraints

Hi,
   I have a 1-d vector x of values but it is rather noisy. I know a priori 
that the density function should be monotonically decreasing, but my data 
doesnt have that. Is there a way to transform the data in such a way so 
that the resultant density be monotonically decreasing?
Thanks
Debayan