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Cosmetic improvements in prior_draw.m

time-shift
Johannes Pfeifer 2015-04-04 19:38:26 +02:00
parent f57cf46df9
commit 2620322122
1 changed files with 15 additions and 5 deletions
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20
matlab/prior_draw.m
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@ -1,9 +1,17 @@
function pdraw = prior_draw(init,uniform) % --*-- Unitary tests --*--
% This function generate one draw from the joint prior distribution.
% This function generate one draw from the joint prior distribution and
% allows sampling uniformly from the prior support (uniform==1 when called with init==1)
%
% INPUTS
% o init [integer] scalar equal to 1 (first call) or 0.
% o uniform [integer] scalar equal to 1 (first call) or 0.
% o init [integer] scalar equal to:
% 1: first call to set up persistent variables
% describing the prior
% 0: subsequent call to get prior
% draw
% o uniform [integer] scalar used in initialization (init=1), equal to:
% 1: sample uniformly from prior
% support (overwrites prior shape used for sampling within this function)
% 0: sample from joint prior distribution
%
% OUTPUTS
% o pdraw [double] 1*npar vector, draws from the joint prior density.
@ -14,7 +22,9 @@ function pdraw = prior_draw(init,uniform) % --*-- Unitary tests --*--
%
% NOTE 1. Input arguments 1 an 2 are only needed for initialization.
% NOTE 2. A given draw from the joint prior distribution does not satisfy BK conditions a priori.
% NOTE 3. This code relies on bayestopt_ as created in the base workspace
% by the preprocessor (or as updated in subsequent pieces of code and handed to the base workspace)
%
% Copyright (C) 2006-2015 Dynare Team
%
% This file is part of Dynare.
@ -87,7 +97,7 @@ if nargin>0 && init
else
inverse_gamma_2_draws = 1;
end
pdraw = zeros(number_of_estimated_parameters,1);
pdraw = NaN(number_of_estimated_parameters,1);
return
end