Changeset 8745

Timestamp:

Sep 5, 2006, 5:37:53 PM (20 years ago)

Author:

jhoblitt

Message:

force the stddev of a set of 1 to be 0

File:

• trunk/PS-IPP-Config/lib/PS/IPP/Metadata/Stats.pm (modified) (2 diffs)

trunk/PS-IPP-Config/lib/PS/IPP/Metadata/Stats.pm

@@ -1 +1 @@
 # Copyright (c) 2006  Paul Price, Joshua Hoblitt
 #
-# $Id: Stats.pm,v 1.9 2006-09-06 03:24:49 jhoblitt Exp $
+# $Id: Stats.pm,v 1.10 2006-09-06 03:37:53 jhoblitt Exp $
 
 package PS::IPP::Metadata::Stats;
@@ -101 +101 @@
         $meanStats->add_data(@{$self->{bg_data}});
         $self->bg_mean($meanStats->mean());
-        $self->bg_stdev($meanStats->standard_deviation());
+        # XXX the stddev of a set of 1, appears to be a statistics undefined
+        # value, however that doesn't do us much go so I'm changing undef to 0
+        $self->bg_stdev($meanStats->standard_deviation() || 0);
     } else {
         $self->bg_mean(undef);