## Copyright (C) 2017 Jens Ahrensfeld
## 
## 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 3 of the License, or
## (at your option) 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, see <http://www.gnu.org/licenses/>.

## -*- texinfo -*- 
## @deftypefn {Function File} {@var{retval} =} psample (@var{input1}, @var{input2})
##
## @seealso{}
## @end deftypefn

## Author: Jens Ahrensfeld <ahrensfeld@w2ess001vm>
## Created: 2017-04-19

function [h] = psample (N)
P = [10 10 10 10];
R = calcRange(P);

h = zeros(1, length(P));

for k=1:N,
	ii = getSample(R);
	h(ii) = h(ii) + 1/N;
end

function R = calcRange(P)
P = P / sum(P)
R0 = 0;
for k=1:length(P)
	R0 = R0 + P(k);
	R(k) = R0;
end

function ii = getSample(R)
Z = rand();
cand = find(Z <= R);
ii=cand(1);