Thanks Peter, will take a look at this package.

Regards,
Indrajit



________________________________
 From: Peter Ruckdeschel <peter.ruckdeschel@web.de>
To: r-help@stat.math.ethz.ch 
Sent: Wednesday, November 30, 2011 5:03 PM
Subject: Re: [R] Negative exponential fit


I do not want to shed out any doubt as to the merits of
pkg fitdistrplus, in particular for censored data, but
seconding Uwe's reply later in this thread, you may
also want to check out pkg distrMod on CRAN ---

M. Kohl, P. Ruckdeschel (2010): R Package distrMod: S4
  Classes and Methods for Probability Models. Journal of Statistical
  Software, 35(10), 1-27. URL http://www.jstatsoft.org/v35/i10/.

which offers quite some additional flexibility for model
fitting---including "new models" (built on distributions
which "have no name" but instead are image distributions
under arithmetic transformations of existing ones, see
example M2 in the cited ref) and (nonlinear) transformations
of the parameter (see Example p.15, cited ref).

Best regards,
Peter

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