From 9c3c0d727f7fe336c02e580c57b13f5ab9f29314 Mon Sep 17 00:00:00 2001
From: Johannes Pfeifer <jpfeifer@gmx,de>
Date: Wed, 17 Sep 2014 20:06:57 +0200
Subject: [PATCH] Add check for point priors and force user to fix this
 parameter.

Traps Inf-prior
---
 matlab/set_prior.m | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/matlab/set_prior.m b/matlab/set_prior.m
index 7bc3cc83d..a72a6204d 100644
--- a/matlab/set_prior.m
+++ b/matlab/set_prior.m
@@ -155,6 +155,12 @@ end
 bayestopt_.p6 = NaN(size(bayestopt_.p1)) ;
 bayestopt_.p7 = bayestopt_.p6 ;
 
+%% check for point priors and disallow them as they do not work with MCMC
+if any(bayestopt_.p2 ==0)
+    error(sprintf(['Error in prior for %s: you cannot use a point prior in estimation. Either increase the prior standard deviation',...
+        ' or fix the parameter completely.'], bayestopt_.name{bayestopt_.p2 ==0}))
+end
+
 % generalized location parameters by default for beta distribution
 k = find(bayestopt_.pshape == 1);
 k1 = find(isnan(bayestopt_.p3(k)));