--- loncom/metadata_database/LONCAPA/lonmetadata.pm	2007/05/12 23:03:30	1.20
+++ loncom/metadata_database/LONCAPA/lonmetadata.pm	2007/05/12 23:24:56	1.21
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonmetadata.pm,v 1.20 2007/05/12 23:03:30 albertel Exp $
+# $Id: lonmetadata.pm,v 1.21 2007/05/12 23:24:56 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -795,23 +795,17 @@ sub process_dynamic_metadata {
     # Get the statistical data - Use a weighted average
     foreach my $type (qw/avetries difficulty disc/) {
         my $studentcount;
+	my %course_counted;
         my $sum;
         my @Values;
         my @Students;
         #
-        # Old data
-        foreach my $coursedata (values(%{$resdata->{'statistics'}}),
-                                values(%{$resdata->{'stats'}})) {
-            if (ref($coursedata) eq 'HASH' && exists($coursedata->{$type})) {
-                $studentcount += $coursedata->{'stdno'};
-                $sum += ($coursedata->{$type}*$coursedata->{'stdno'});
-                push(@Values,$coursedata->{$type});
-                push(@Students,$coursedata->{'stdno'});
-            }
-        }
+        # New data
         if (exists($resdata->{'stats'})) {
             foreach my $identifier (sort(keys(%{$resdata->{'stats'}}))) {
                 my $coursedata = $resdata->{'stats'}->{$identifier};
+		next if (lc($coursedata->{$type}) eq 'nan');
+		$course_counted{$coursedata->{'course'}}++;
                 $studentcount += $coursedata->{'stdno'};
                 $sum += $coursedata->{$type}*$coursedata->{'stdno'};
                 push(@Values,$coursedata->{$type});                
@@ -819,7 +813,18 @@ sub process_dynamic_metadata {
             }
         }
         #
-        # New data
+        # Old data
+	foreach my $course (keys(%{$resdata->{'statistics'}})) {
+	    next if (exists($course_counted{$course}));
+	    my $coursedata = $resdata->{'statistics'}{$course};
+            if (ref($coursedata) eq 'HASH' && exists($coursedata->{$type})) {
+		next if (lc($coursedata->{$type}) eq 'nan');
+                $studentcount += $coursedata->{'stdno'};
+                $sum += ($coursedata->{$type}*$coursedata->{'stdno'});
+                push(@Values,$coursedata->{$type});
+                push(@Students,$coursedata->{'stdno'});
+            }
+        }
         if (defined($studentcount) && $studentcount>0) {
             $data{$type} = $sum/$studentcount;
             $data{$type.'_list'} = join(',',@Values);