Creates a probability density function from a current
distribution to be used for fitting a censored or interval response variable.
for extra arguments
This function is used to calculate the likelihood function for censored data.
This function is not supposed to be used on its own but it is used in function
Returns a modified d family function.
The argument of the original function
d function are the same.
For an example see
Rigby, R. A. and Stasinopoulos D. M. (2005). Generalized additive models for location, scale and shape,(with discussion), Appl. Statist., 54, part 3, pp 507-554.
Stasinopoulos D. M., Rigby R.A. and Akantziliotou C. (2006) Instructions on how to use the GAMLSS package in R. Accompanying documentation in the current GAMLSS help files, (see also http://www.gamlss.org/).
Stasinopoulos D. M. Rigby R.A. (2007) Generalized additive models for location scale and shape (GAMLSS) in R. Journal of Statistical Software, Vol. 23, Issue 7, Dec 2007, http://www.jstatsoft.org/v23/i07.
#see the help for function cens for an example