SN                package:sn                R Documentation(latin1)

_P_a_c_k_a_g_e _s_n: _s_u_m_m_a_r_y _i_n_f_o_r_m_a_t_i_o_n

_D_e_s_c_r_i_p_t_i_o_n:

     This package provides functions related to the skew-normal (SN)
     and the skew-t (ST) probability distributions, both for the
     univariate  and for the the multivariate case, including
     regression models.

_F_u_n_c_t_i_o_n_s:

     The package includes several functions, a number of which are
     intended as services to other functions, not really to be called
     directly by the users. The following ones are those more relevant
     for practical use. 

     _SN distribution:_ 'dsn', 'psn', 'qsn', 'rsn', 'cp.to.dp',
     'dp.to.cp', 'sn.mle', 'sn.em',  for the univariate case, and 
     'dmsn', 'pmsn', 'rmsn',  'msn.fit', 'msn.mle', 'dsn2.plot'  for
     the multivariate case. 

     _ST distribution:_ 'dst', 'pst', 'rst', 'st.mle',  for the
     univariate case, and 'dmst','pmst', 'rmst',  'mst.fit', 'mst.mle',
     'dst2.plot'  for the multivariate case. 

     It is suggested that a user starts by reading the  documentation
     of  (some of) these functions.

_R_e_q_u_i_r_e_m_e_n_t_s:

     R 2.2.0. A few functions make use of package 'mnormt':  'psn',
     'pmsn', 'pmst'.

_V_e_r_s_i_o_n:

     The version level of the package is given by the  command 
     'print(.sn.version)'. The most recent version of the package can
     be obtained from the WWW page: <URL:
     http://azzalini.stat.unipd.it/SN> which also contains other
     related material

_A_u_t_h_o_r:

     Adelchi Azzalini, Dipart. Scienze Statistiche, Universit di
     Padova, Italia. Please send comments, error reports, etc. to the
     author whose WWW page is <URL: http://azzalini.stat.unipd.it/>.

_L_i_c_e_n_c_e:

     This package and its documentation are usable under the terms of
     the  "GNU General Public License", a copy of which is distributed
     with the  package. While the software is freely usable, it would
     be appreciated if a reference is inserted in publications or other
     work which makes use of it; for this purpose, see the command
     'citation("sn")'.

_A_c_k_n_o_w_l_e_d_g_e_m_e_n_t_s:

     The package has evolved through several  versions, developed over
     some years.

     For versions up to 0.20, the following people and institutions 
     have contributed. Many thanks go to Antonella Capitanio for
     testing  the procedures, and to Brian Ripley, Kurt Hornik and 
     Martin Maechler for useful  advice on R. The function 'num.deriv2'
     is based on a similar  function written  by Monica Chiogna. The
     first version of this software and part of the associated
     theoretical work has been developed  while the author was at the
     Nuffield College, Oxford, under the Jemolo  Fellowship scheme; the
     generous support of the  college is gratefully  acknowledged. 
     Additional support for the development of the theoretical research
     work has  been  provided by the "Consiglio Nazionale delle
     Ricerche" of Italy, grant  no.97.01331.CT10.

     Versions 0.21 to 0.30 have been supported by "MIUR", Italy, under
     grant  scheme PRIN 2000. Again, thanks to Antonella Capitanio for
     additional testing of those versions of the package.

