Re: [R] truncated distributions

2011-04-02 Thread David Winsemius
On Apr 2, 2011, at 1:15 PM, statfan wrote: The definition of the "mean vector" is essentially what my question boils down to. In the functions details, the author states "We sample x ~ T(mean, Sigma, df) subject to the rectangular truncation lower <= x <= upper. Currently, two random numb

Re: [R] truncated distributions

2011-04-02 Thread statfan
The definition of the "mean vector" is essentially what my question boils down to. In the functions details, the author states "We sample x ~ T(mean, Sigma, df) subject to the rectangular truncation lower <= x <= upper. Currently, two random number generation methods are implemented: rejection sa

Re: [R] truncated distributions

2011-04-02 Thread David Winsemius
On Apr 2, 2011, at 11:06 AM, statfan wrote: I am sampling from the truncated multivariate student t distribution "rtmvt" in the package {tmvtnorm}. My question is about the mean vector. Is it possible to define a mean vector outside of the truncated region? Thank you in advance for any h

[R] truncated distributions

2011-04-02 Thread statfan
I am sampling from the truncated multivariate student t distribution "rtmvt" in the package {tmvtnorm}. My question is about the mean vector. Is it possible to define a mean vector outside of the truncated region? Thank you in advance for any help. -- View this message in context: http://r.78969

[R] Truncated Distributions - Estimating parameters

2010-03-31 Thread Julia Cains
Dear R users, I am working on the Value at Risk (VaR) for the Operational risk. For a given loss data, we try to fit some statistical distributions using Kolmogorov-Smirnov (KS) test and A-D test and then for fitted distribution using the estimated parameters, the losses are simulated and the