Mercurial > octave-nkf

diff scripts/statistics/distributions/normcdf.m @ 12749:e7cc2d4a6db3 stable

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Fix range of sigma in normal distribution to exclude 0. * normcdf.m, normpdf.m: Correct 's >= 0' to 's > 0'.
author Rik <octave@nomad.inbox5.com>
date Thu, 16 Jun 2011 21:05:10 -0700
parents fd0a3ac60b0e
children 19b9f17d22af
line wrap: on
line diff
--- a/scripts/statistics/distributions/normcdf.m	Wed Jun 15 10:35:37 2011 -0400
+++ b/scripts/statistics/distributions/normcdf.m	Thu Jun 16 21:05:10 2011 -0700
@@ -50,18 +50,18 @@
   cdf = zeros (sz);
 
   if (isscalar (m) && isscalar(s))
-    if (find (isinf (m) | isnan (m) | !(s >= 0) | !(s < Inf)))
+    if (find (isinf (m) | isnan (m) | !(s > 0) | !(s < Inf)))
       cdf = NaN (sz);
     else
       cdf =  stdnormal_cdf ((x - m) ./ s);
     endif
   else
-    k = find (isinf (m) | isnan (m) | !(s >= 0) | !(s < Inf));
+    k = find (isinf (m) | isnan (m) | !(s > 0) | !(s < Inf));
     if (any (k))
       cdf(k) = NaN;
     endif
 
-    k = find (!isinf (m) & !isnan (m) & (s >= 0) & (s < Inf));
+    k = find (!isinf (m) & !isnan (m) & (s > 0) & (s < Inf));
     if (any (k))
       cdf(k) = stdnormal_cdf ((x(k) - m(k)) ./ s(k));
     endif