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Diff for /loncom/interface/loncoursedata.pm between versions 1.127 and 1.128

version 1.127, 2004/03/23 16:35:15 version 1.128, 2004/03/26 22:01:30
Line 2004  sub get_problem_statistics { Line 2004  sub get_problem_statistics {
     $dbh->do($request);      $dbh->do($request);
     #      #
     # Collect the first suite of statistics      # Collect the first suite of statistics
     $request = 'SELECT COUNT(*),SUM(tries),MAX(tries),AVG(tries),STD(tries) '.      $request = 'SELECT COUNT(*),SUM(tries),'.
           'AVG(tries),STD(tries) '.
         'FROM '.$stats_table;          'FROM '.$stats_table;
     my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request      my ($num,$tries,$mean,$STD) = &execute_SQL_request
         ($dbh,$request);          ($dbh,$request);
       #
       $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
           ' WHERE awarded>0';
       if (defined($time_requirements)) {
           $request .= ' AND '.$time_requirements;
       }
       my ($max,$min) = &execute_SQL_request($dbh,$request);
       #
     $request = 'SELECT SUM(awarded) FROM '.$stats_table;      $request = 'SELECT SUM(awarded) FROM '.$stats_table;
       if (defined($time_requirements)) {
           $request .= ' AND '.$time_requirements;
       }
     my ($Solved) = &execute_SQL_request($dbh,$request);      my ($Solved) = &execute_SQL_request($dbh,$request);
       #
     $request = 'SELECT SUM(awarded) FROM '.$stats_table.      $request = 'SELECT SUM(awarded) FROM '.$stats_table.
         " WHERE solved='correct_by_override'";          " WHERE solved='correct_by_override'";
       if (defined($time_requirements)) {
           $request .= ' AND '.$time_requirements;
       }
     my ($solved) = &execute_SQL_request($dbh,$request);      my ($solved) = &execute_SQL_request($dbh,$request);
     #      #
     $num    = 0 if (! defined($num));      $num    = 0 if (! defined($num));
     $tries  = 0 if (! defined($tries));      $tries  = 0 if (! defined($tries));
     $mod    = 0 if (! defined($mod));      $max    = 0 if (! defined($max));
       $min    = 0 if (! defined($min));
     $STD    = 0 if (! defined($STD));      $STD    = 0 if (! defined($STD));
     $Solved = 0 if (! defined($Solved));      $Solved = 0 if (! defined($Solved));
     $solved = 0 if (! defined($solved));      $solved = 0 if (! defined($solved));
Line 2027  sub get_problem_statistics { Line 2044  sub get_problem_statistics {
     #      #
     my $SKEW = 'nan';      my $SKEW = 'nan';
     my $wrongpercent = 0;      my $wrongpercent = 0;
       my $numwrong = 'nan';
     if ($num > 0) {      if ($num > 0) {
         ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.          ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
                                      'POWER(tries - '.$STD.',3)'.                                       'POWER(tries - '.$STD.',3)'.
                                      '))/'.$num.' FROM '.$stats_table);                                       '))/'.$num.' FROM '.$stats_table);
         $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;          $numwrong = $num-$Solved;
           $wrongpercent=int(10*100*$numwrong/$num)/10;
     }      }
     #      #
     # Drop the temporary table      # Drop the temporary table
Line 2055  sub get_problem_statistics { Line 2074  sub get_problem_statistics {
     # Return result      # Return result
     return { num_students => $num,      return { num_students => $num,
              tries        => $tries,               tries        => $tries,
              max_tries    => $mod,               max_tries    => $max,
                min_tries    => $min,
              mean_tries   => $mean,               mean_tries   => $mean,
              std_tries    => $STD,               std_tries    => $STD,
              skew_tries   => $SKEW,               skew_tries   => $SKEW,
              num_solved   => $Solved,               num_solved   => $Solved,
              num_override => $solved,               num_override => $solved,
                num_wrong    => $numwrong,
              per_wrong    => $wrongpercent,               per_wrong    => $wrongpercent,
              deg_of_diff  => $DegOfDiff };               deg_of_diff  => $DegOfDiff };
 }  }
Removed from v.1.127  
changed lines
  Added in v.1.128

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