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Diff for /loncom/interface/loncoursedata.pm between versions 1.108 and 1.109

version 1.108, 2003/10/30 16:20:18 version 1.109, 2003/12/09 21:14:23
Line 73  and/or itself. Line 73  and/or itself.
   
 =item &get_sequence_assessment_data()  =item &get_sequence_assessment_data()
   
 AT THIS TIME THE USE OF THIS FUNCTION IS *NOT* RECOMMENDED  
   
 Use lonnavmaps to build a data structure describing the order and   Use lonnavmaps to build a data structure describing the order and 
 assessment contents of each sequence in the current course.  assessment contents of each sequence in the current course.
   
Line 1889  sub get_problem_statistics { Line 1887  sub get_problem_statistics {
     my $dbh = &Apache::lonmysql::get_dbh();      my $dbh = &Apache::lonmysql::get_dbh();
     return undef if (! defined($dbh));      return undef if (! defined($dbh));
     #      #
     # A) Number of Students attempting problem  
     # B) Total number of tries of students attempting problem  
     # C) Mod (largest number of tries for solving the problem)  
     # D) Mean (average number of tries for solving the problem)  
     # E) Number of students to solve the problem  
     # F) Number of students to solve the problem by override  
     # G) Number of students unable to solve the problem  
     # H) Degree of difficulty : 1-(E+F)/B  
     # I) Standard deviation of number of tries  
     # J) Skew of tries: sqrt(sum(Xi-D)^3)/A  
     #  
     $dbh->do('DROP TABLE '.$stats_table);  # May return an error      $dbh->do('DROP TABLE '.$stats_table);  # May return an error
     my $request =       my $request = 
         'CREATE TEMPORARY TABLE '.$stats_table.          'CREATE TEMPORARY TABLE '.$stats_table.
             ' SELECT student_id,solved,award,tries FROM '.$performance_table.              ' SELECT student_id,solved,award,awarded,tries FROM '.$performance_table.
                 ' WHERE symb_id='.$symb_id.' AND part_id='.$part_id;                  ' WHERE symb_id='.$symb_id.' AND part_id='.$part_id;
     if (defined($students)) {      if (defined($students)) {
         $request .= ' AND ('.          $request .= ' AND ('.
Line 1915  sub get_problem_statistics { Line 1902  sub get_problem_statistics {
     }      }
 #    &Apache::lonnet::logthis($request);  #    &Apache::lonnet::logthis($request);
     $dbh->do($request);      $dbh->do($request);
   #    &Apache::lonnet::logthis('request = '.$/.$request);
       $request = 'SELECT COUNT(*),SUM(tries),MAX(tries),AVG(tries),STD(tries) '.
           'FROM '.$stats_table;
     my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request      my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request
         ($dbh,          ($dbh,$request);
          'SELECT COUNT(*),SUM(tries),MAX(tries),AVG(tries),STD(tries) FROM '.  #    &Apache::lonnet::logthis('request = '.$/.$request);
          $stats_table);      $request = 'SELECT SUM(awarded) FROM '.$stats_table;
     my ($Solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.      my ($Solved) = &execute_SQL_request($dbh,$request);
                                         $stats_table.  #    &Apache::lonnet::logthis('request = '.$/.$request);
          " WHERE solved='correct_by_student' OR solved='correct_by_scantron'");      $request = 'SELECT SUM(awarded) FROM '.$stats_table.
     my ($solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.          " WHERE solved='correct_by_override'";
                                         $stats_table.  #    &Apache::lonnet::logthis('request = '.$/.$request);
                                         " WHERE solved='correct_by_override'");      my ($solved) = &execute_SQL_request($dbh,$request);
   #    $Solved = int($Solved);
   #    $solved = int($solved);
       #
     $num    = 0 if (! defined($num));      $num    = 0 if (! defined($num));
     $tries  = 0 if (! defined($tries));      $tries  = 0 if (! defined($tries));
     $mod    = 0 if (! defined($mod));      $mod    = 0 if (! defined($mod));
Line 1944  sub get_problem_statistics { Line 1937  sub get_problem_statistics {
         $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;          $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;
     }      }
     #      #
     $dbh->do('DROP TABLE '.$stats_table);  # May return an error  #    $dbh->do('DROP TABLE '.$stats_table);  # May return an error
     #      #
     # Store in metadata      # Store in metadata
     #      #
Removed from v.1.108  
changed lines
  Added in v.1.109

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