getpmat.m

gaussian procession 原程序,用于解决分类问题,有兴趣可以看看啊

function P = getPmat(c,pye,nn)

% calculates a (sparse) diagonal probability matrix
%
% P = getPmat(c,pye,nn)
% c   : which class
% pye : probability vector for all classes
% nn  : number of points to extract from class c

%            Matlab code for Gaussian Processes for Classification:
%                      GPCLASS version 0.2  10 Nov 97
%       Copyright (c) David Barber and Christopher K I Williams (1997)

%    This program is free software; you can redistribute it and/or modify
%    it under the terms of the GNU General Public License as published by
%    the Free Software Foundation; either version 2 of the License, or
%    any later version.
%
%    This program is distributed in the hope that it will be useful,
%    but WITHOUT ANY WARRANTY; without even the implied warranty of
%    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%    GNU General Public License for more details.
%
%    You should have received a copy of the GNU General Public License
%    along with this program; if not, write to the Free Software
%    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.


P = diag(pye(1+(c-1)*nn:c*nn,1));

P = sparse(P);