version 1.63, 2003/03/27 19:29:36
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version 1.64, 2003/03/28 15:19:35
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Line 1150 the students you are concerned with prio
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Line 1150 the students you are concerned with prio
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Inputs: $students, $symb, $part, $courseid |
Inputs: $students, $symb, $part, $courseid |
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=over 4 |
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=item $students is an array of hash references. |
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Each hash must contain at least the 'username' and 'domain' of a student. |
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=item $symb is the symb for the problem. |
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=item $part is the part id you need statistics for |
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=item $courseid is the course id, of course! |
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=back |
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Outputs: See the code for up to date information. |
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=over 4 |
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=item $num The number of students attempting the problem |
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=item $tries The total number of tries for the students |
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=item $mod The maximum number of tries taken |
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=item $mean The average number of tries |
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=item $Solved The number of students able to solve the problem |
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=item $solved The number of students whose answer is 'correct_by_override' |
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=item $DegOfDiff The degree of difficulty of the problem |
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=item $STD The standard deviation of the number of tries |
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=item $SKEW The skew of the number of tries |
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=back |
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=cut |
=cut |
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################################################ |
################################################ |
Line 1182 sub get_problem_statistics {
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Line 1219 sub get_problem_statistics {
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'CREATE TEMPORARY TABLE '.$stats_table. |
'CREATE TEMPORARY TABLE '.$stats_table. |
' SELECT student_id,solved,award,tries FROM '.$performance_table. |
' SELECT student_id,solved,award,tries FROM '.$performance_table. |
' WHERE symb_id='.$symb_id.' AND part_id='.$part_id; |
' WHERE symb_id='.$symb_id.' AND part_id='.$part_id; |
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if (defined($students)) { |
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$request .= ' AND ('. |
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join(' OR ', map {'student_id='. |
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&get_student_id($_->{'username'}, |
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$_->{'domain'}) |
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} @$students |
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).')'; |
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} |
# &Apache::lonnet::logthis($request); |
# &Apache::lonnet::logthis($request); |
$dbh->do($request); |
$dbh->do($request); |
my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request |
my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request |