loncom/interface/lonstatistics.pm - diff

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Diff for /loncom/interface/lonstatistics.pm between versions 1.4 and 1.5

version 1.4, 2002/02/06 16:59:01	version 1.5, 2002/03/02 01:42:42
Line 27	Line 27
#	#
# (Navigate problems for statistical reports	# (Navigate problems for statistical reports
# YEAR=2001	# YEAR=2001
# 5/05/01, 7/09/01, 7/25/01, 8/11/01,9/13/01, 9/26/01 Behrouz Minaei	# 5/05,7/09,7/25/01,8/11,9/13,9/26,10/5,10/9,10/22,10/26 Behrouz Minaei
# 10/5/01, 10/9/01, 10/22/01, 10/26/01 Behrouz Minaei	# 11/1, 11/4, 11/16, 12/14, 12/16, 12/18,12/20,12/31 Behrouz Minaei
# 11/1/01, 11/4/01, 11/16/01 Behrouz Minaei
# 12/14/01, 12/16/01, 12/18/01,12/20/01,12/31/01 Behrouz Minaei
# YEAR=2002	# YEAR=2002
# 1/22/02,2/1/02 Behrouz Minaei	# 1/22, 2/1, 2/6, 2/25 Behrouz Minaei
###	###

package Apache::lonstatistics;	package Apache::lonstatistics;
Line 50 my %hash;	Line 48 my %hash;
my %CachData;	my %CachData;
my %GraphDat;	my %GraphDat;
my %maps;	my %maps;
my @mapsort;	my %mapsort;
my %section;	my %section;
my %StuBox;	my %StuBox;
my %DiscFac;	my %DiscFac;
Line 74 my $GData;	Line 72 my $GData;
my $cid;	my $cid;
my $firstres;	my $firstres;
my $lastres;	my $lastres;
my $DiscFlag=0;	my $DiscFlag;
my $HWN=0;	my $HWN;
	my $P_Order;
my %Header = (0,"Problem Title",1,"#Stdnts",2,"Tries",3,"Mod",	my %Header = (0,"Homework Problems",1,"#Stdnts",2,"Tries",3,"Mod",
4,"Mean",5,"#YES",6,"#yes",7,"%Wrng",8,"S.D.",	4,"Mean",5,"#YES",6,"#yes",7,"%Wrng",8,"DoDiff",
9,"Skew.",10,"DoDiff",11,"Map");	9,"S.D.",10,"Skew.",11,"Map");
# 9,"Skew.",10,"DoDiff",11,"Dis.F.",12,"Resourse URL");	# 11,"Dis.F.",12,"Resourse URL");

sub NumericSort {	sub NumericSort {
$a <=> $b;	$a <=> $b;
Line 98 sub StudentReport {	Line 96 sub StudentReport {
my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$cid,$shome );	my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$cid,$shome );
my %result = ();	my %result = ();
my $ResId;	my $ResId;
	my $PrOrd;
my $Code;	my $Code;
my $Tries;	my $Tries;
my $TotalTries = 0;	my $TotalTries = 0;
Line 117 sub StudentReport {	Line 116 sub StudentReport {
"\n".'<th> Tries </th>'.	"\n".'<th> Tries </th>'.
"\n".'</tr>';	"\n".'</tr>';
unless ($reply=~/^error\:/) {	unless ($reply=~/^error\:/) {
map {	foreach (split(/\&/,$reply)){
my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));	my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));
$result{$name}=$value;	$result{$name}=$value;
} split(/\&/,$reply);;	}
foreach $ResId (@cols) {	foreach my $CurCol (@cols) {
if ( !$ResId ) {	if (!$CurCol){
my $Set=&Apache::lonnet::declutter($hash{'map_id_'.$1});	my $Set=&Apache::lonnet::declutter($hash{'map_id_'.$1});
if ( $Set ) {	if ( $Set ) {
$SetNo++;	$SetNo++;
Line 137 sub StudentReport {	Line 136 sub StudentReport {
$PtrCod='';	$PtrCod='';
next;	next;
}	}
	($PrOrd,$ResId)=split(/\:/,$CurCol);
$ResId=~/(\d+)\.(\d+)/;	$ResId=~/(\d+)\.(\d+)/;
my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );	my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );
if ( $CurMap ne 'All Maps' ) {	if ( $CurMap ne 'All Maps' ) {
Line 146 sub StudentReport {	Line 146 sub StudentReport {
my $meta=$hash{'src_'.$ResId};	my $meta=$hash{'src_'.$ResId};
my $PartNo = 0;	my $PartNo = 0;
undef %TempHash;	undef %TempHash;
map {	foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))){
if ($_=~/^stores\_(\d+)\_tries$/) {	if ($_=~/^stores\_(\d+)\_tries$/) {
my $Part=&Apache::lonnet::metadata($meta,$_.'.part');	my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
if ( $TempHash{"$Part"} eq '' ) {	if ( $TempHash{"$Part"} eq '' ) {
$TempHash{"$Part"} = $Part;	$TempHash{"$Part"} = $Part;
$TempHash{$PartNo}=$Part;	$TempHash{$PartNo}=$Part;
$TempHash{"$Part.Code"} = '-';	$TempHash{"$Part.Code"} = '-';
	$TempHash{"$Part.PrOrd"} = $PrOrd+$PartNo;
$PartNo++;	$PartNo++;
}	}
}	}
} split(/\,/,&Apache::lonnet::metadata($meta,'keys'));	}

my $Prob = $Map.'___'.$2.'___'.	my $Prob = $Map.'___'.$2.'___'.
&Apache::lonnet::declutter( $hash{'src_'.$ResId} );	&Apache::lonnet::declutter( $hash{'src_'.$ResId} );
Line 210 sub StudentReport {	Line 211 sub StudentReport {
$r->rflush();	$r->rflush();
}	}

	sub CreateTable {
	my ($Hd, $Hid)=@_;
	if ( $Hd == 1 ) {
	# $Hid=~/(\d+)\.(\d+)/;
	$r->print('<br><a href="'.$hash{'src_'.$Hid}.
	'" target="_blank">'.$hash{'title_'.$Hid}.'</a>'
	# .' ('.&Apache::lonnet::declutter($hash{'map_id_'.$1}).')'
	);
	}
	my $Result = "\n".'<table border=2>';
	$Result .= '<tr><th>P#</th>'."\n";
	for ( my $nIdx=0; $nIdx < 11; $nIdx++ ) {
	$Result .= '<th>'.'<input type="submit" name="sort" value="'.
	$Header{$nIdx}.'" />'.'</th>'."\n";
	}
	$Result .= "\n".'</tr>'."\n";
	$r->print( $Result );
	$r->rflush();
	}

	sub CloseTable {
	$r->print("\n".'</table>'."\n");
	$r->rflush();
	}

# ------------------------------------------- Prepare Statistics Table	# ------------------------------------------- Prepare Statistics Table
sub PreStatTable {	sub PreStatTable {
my $CacheDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".	my $CacheDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
Line 235 sub PreStatTable {	Line 260 sub PreStatTable {
' #Stdnts: Total Number of Students opened the problem.<br>'.	' #Stdnts: Total Number of Students opened the problem.<br>'.
' Tries : Total Number of Tries for solving the problem.<br>'.	' Tries : Total Number of Tries for solving the problem.<br>'.
' Mod : Maximunm Number of Tries for solving the problem.<br>'.	' Mod : Maximunm Number of Tries for solving the problem.<br>'.
' Mean : Average Number of the tries. [ Tries / #Stdns ]<br>'.	' Mean : Average Number of the tries. [ Tries / #Stdnts ]<br>'.
' #YES : Number of students solved the problem correctly.<br>'.	' #YES : Number of students solved the problem correctly.<br>'.
' #yes : Number of students solved the problem by override.<br>'.	' #yes : Number of students solved the problem by override.<br>'.
' %Wrng : Percentage of students tried to solve the problem but'.	' %Wrng : Percentage of students tried to solve the problem but'.
' still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ]<br>'.	' still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ]<br>'.
	# ' DoDiff : Degree of Difficulty of the problem. [ Tries/(#YES+#yes+0.1) ]<br>'.
	' DoDiff : Degree of Difficulty of the problem. [ 1 - ((#YES+#yes) / Tries) ]<br>'.
' S.D. : Standard Deviation of the tries.'.	' S.D. : Standard Deviation of the tries.'.
'[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1)'.	'[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1)'.
' where Xi is every student\'s tries ]<br>'.	' where Xi denotes every student\'s tries ]<br>'.
' Skew. : Skewness of the students tries.'.	' Skew. : Skewness of the students tries.'.
' [ (sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3) ]<br>'.	' [ (sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3) ]<br>'.
# ' DoDiff : Degree of Difficulty of the problem. [ Tries/(#YES+#yes+0.1) ]<br>'.
' DoDiff : Degree of Difficulty of the problem. [ 1 - ((#YES+#yes) / Tries) ]<br>'.
# ' Dis.F. : Discrimination Factor. [ Sum of Partial Credits Awarded / Total Number of Tries in %27 upper and lower students]</b>'.	# ' Dis.F. : Discrimination Factor. [ Sum of Partial Credits Awarded / Total Number of Tries in %27 upper and lower students]</b>'.
'</pre>';	'</pre>';

$r->print($Ptr);	$r->print($Ptr);
$r->rflush();	$r->rflush();

my $Result = "\n".'<table border=2>';
$Result .= '<tr><th>P#</th>'."\n";
for ( my $nIdx=0; $nIdx < 12; $nIdx++ ) {
$Result .= '<th>'.'<input type="submit" name="sort" value="'.
$Header{$nIdx}.'" />'.'</th>'."\n";
}
$Result .= "\n".'</tr>'."\n";
$r->print( $Result );
$r->rflush();

if ((-e "$CacheDB")&&($ENV{'form.sort'} ne 'Recalculate Statistics')) {	if ((-e "$CacheDB")&&($ENV{'form.sort'} ne 'Recalculate Statistics')) {
if (tie(%CachData,'GDBM_File',"$CacheDB",&GDBM_READER,0640)) {	if (tie(%CachData,'GDBM_File',"$CacheDB",&GDBM_READER,0640)) {
Line 289 sub PreStatTable {	Line 305 sub PreStatTable {

untie(%CachData);	untie(%CachData);
untie(%GraphDat);	untie(%GraphDat);
untie(%DiscFac);	untie(%DiscFac);

$r->print("\n".'</table>'."\n");
$r->rflush();
}	}


Line 329 sub ExtractStudentData {	Line 342 sub ExtractStudentData {
my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$coid,$shome );	my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$coid,$shome );
my %result = ();	my %result = ();
my $ResId;	my $ResId;
	my $PrOrd;
my $Dis = '';	my $Dis = '';
my $Code;	my $Code;
my $Tries;	my $Tries;
Line 346 sub ExtractStudentData {	Line 360 sub ExtractStudentData {
my $SecLimit;	my $SecLimit;
my $MapLimit;	my $MapLimit;
unless ($reply=~/^error\:/) {	unless ($reply=~/^error\:/) {
map {	foreach (split(/\&/,$reply)) {
my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));	my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));
$result{$name}=$value;	$result{$name}=$value;
#$r->print($name.'='.$value.'<br>');	}
} split(/\&/,$reply);	foreach my $CurCol(@cols) {
foreach $ResId (@cols) {	($PrOrd,$ResId)=split(/\:/,$CurCol);
if ( !$ResId ) { next; }	if ( !$CurCol ) { next; }
$ResId=~/(\d+)\.(\d+)/;	$ResId=~/(\d+)\.(\d+)/;
my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );	my $MapId=$1;
	my $PrbId=$2;
	my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$MapId} );
if ( $CurMap ne 'All Maps' ) {	if ( $CurMap ne 'All Maps' ) {
my ( $ResMap, $NameMap ) = split(/\=/,$CurMap);	my ( $ResMap, $NameMap ) = split(/\=/,$CurMap);
if ( $Map ne $ResMap ) { next; }	if ( $Map ne $ResMap ) { next; }
Line 363 sub ExtractStudentData {	Line 379 sub ExtractStudentData {
my $PartNo = 0;	my $PartNo = 0;
$Dis .= ':';	$Dis .= ':';
undef %TempHash;	undef %TempHash;
map {	foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
if ($_=~/^stores\_(\d+)\_tries$/) {	if ($_=~/^stores\_(\d+)\_tries$/) {
my $Part=&Apache::lonnet::metadata($meta,$_.'.part');	my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
if ( $TempHash{"$Part"} eq '' ) {	if ( $TempHash{"$Part"} eq '' ) {
$TempHash{"$Part"} = $Part;	$TempHash{"$Part"} = $Part;
$TempHash{$PartNo}=$Part;	$TempHash{$PartNo}=$Part;
$TempHash{"$Part.Code"} = 'U';	$TempHash{"$Part.Code"} = 'U';
	$TempHash{"$Part.PrOrd"} = $PrOrd+$PartNo;
$PartNo++;	$PartNo++;
}	}
}	}
} split(/\,/,&Apache::lonnet::metadata($meta,'keys'));	}

my $Prob = $Map.'___'.$2.'___'.	my $Prob = $Map.'___'.$PrbId.'___'.
&Apache::lonnet::declutter( $hash{'src_'.$ResId} );	&Apache::lonnet::declutter( $hash{'src_'.$ResId} );
$Code='U';	$Code='U';
$Tries = 0;	$Tries = 0;
Line 419 sub ExtractStudentData {	Line 436 sub ExtractStudentData {
if ( $TempHash{$part.'.Code'} eq 'C' \|\|	if ( $TempHash{$part.'.Code'} eq 'C' \|\|
$TempHash{$part.'.Code'} eq 'O' )	$TempHash{$part.'.Code'} eq 'O' )
{$ProbSolved++;$Yes=1;}	{$ProbSolved++;$Yes=1;}
my $ptr = "$hash{'title_'.$ResId}";	# my $ptr = "$hash{'title_'.$ResId}";
	my $ptr = $TempHash{$part.'.PrOrd'}.':'.$ResId;
if ( $PartNo > 1 ) {	if ( $PartNo > 1 ) {
$ptr .= " (part $part)";	$ptr .= "*(part $part)";
$Dis .= ':';	$Dis .= ':';
}	}
my $Fac = ($TempHash{"$part.Tries"}) ?	my $Fac = ($TempHash{"$part.Tries"}) ?
Line 434 sub ExtractStudentData {	Line 452 sub ExtractStudentData {
# $DisF .= '+'.$TempHash{"$part.Time"};	# $DisF .= '+'.$TempHash{"$part.Time"};
$TimeTot += $TempHash{"$part.Time"};	$TimeTot += $TempHash{"$part.Time"};
$Dis .= $ptr.'*'.$ResId.'='.$DisF.'+'.$Yes;	$Dis .= $ptr.'*'.$ResId.'='.$DisF.'+'.$Yes;
$ptr .= "*$ResId:$TempHash{$part.'.Tries'}".	$ptr .= ":$TempHash{$part.'.Tries'}".
":$TempHash{$part.'.Wrongs'}".	":$TempHash{$part.'.Wrongs'}".
":$TempHash{$part.'.Code'}";	":$TempHash{$part.'.Code'}";
#$r->print($sname.' -- '.$ptr.'--- timestamp='.$TempHash{"$part.Time"}.'<br>');
push (@list, $ptr);	push (@list, $ptr);
$TotalOpend++;	$TotalOpend++;
$ProbTot++;	$ProbTot++;
}	}
}	}
else {	#else {
for(my $n=0; $n<$PartNo; $n++) {	#for(my $n=0; $n<$PartNo; $n++) {
push (@list, "$hash{'title_'.$ResId}*$ResId:0:0:U");	# push (@list, "$hash{'title_'.$ResId}*$ResId:0:0:U");
$ProbTot++;	# $ProbTot++;
}	#}
}	#}
}	}
if ( $TotalTries ) {	if ( $TotalTries ) {
my $DisFac = ( $TotalTries ) ? ($TotParCr/$TotalTries) : 0;	my $DisFac = ( $TotalTries ) ? ($TotParCr/$TotalTries) : 0;
Line 456 sub ExtractStudentData {	Line 473 sub ExtractStudentData {
my $DisFactor = sprintf( "%.4f", $DisFac );	my $DisFactor = sprintf( "%.4f", $DisFac );
my $time;	my $time;
if ($ProbSolved){	if ($ProbSolved){
$time = int(($TimeTot/$ProbSolved)/10000000);	$time = int(($TimeTot/$ProbSolved)-10000000);
}	}
$DiscFac{($DisFactor.':'.$sname.':'.$ProbTot.':'.$TotalOpend.':'.	$DiscFac{($DisFactor.':'.$sname.':'.$ProbTot.':'.$TotalOpend.':'.
$TotalTries.':'.$ProbSolved.':'.$time)}=$Dis;	$TotalTries.':'.$ProbSolved.':'.$time)}=$Dis;
Line 472 sub tracetable {	Line 489 sub tracetable {
my ($rid,$beenhere)=@_;	my ($rid,$beenhere)=@_;
$rid=~/(\d+)\.(\d+)/;	$rid=~/(\d+)\.(\d+)/;
$maps{&Apache::lonnet::declutter($hash{'map_id_'.$1})}='';#$hash{'title_'.$rid};	$maps{&Apache::lonnet::declutter($hash{'map_id_'.$1})}='';#$hash{'title_'.$rid};
	#$maps{$HWN}=$hash{'title_'.$rid};
unless ($beenhere=~/\&$rid\&/) {	unless ($beenhere=~/\&$rid\&/) {
$beenhere.=$rid.'&';	$beenhere.=$rid.'&';
if (defined($hash{'is_map_'.$rid})) {	if (defined($hash{'is_map_'.$rid})) {
my $cmap=$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}};	my $cmap=$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}};
if ( $cmap eq 'sequence' \|\| $cmap eq 'page' ) {	if ( $cmap eq 'sequence' \|\| $cmap eq 'page' ) {
$cols[$#cols+1]=0;	$cols[$#cols+1]=0;
$HWN++;	$P_Order++;
$mapsort[$HWN]=$rid.$hash{'title_'.$rid};	$HWN=$P_Order;
	$mapsort{$HWN} = $rid.':';
#$maps{&Apache::lonnet::declutter($hash{'src_'.$rid})}=	#$maps{&Apache::lonnet::declutter($hash{'src_'.$rid})}=
# $hash{'title_'.$rid};	# $hash{'title_'.$rid};
}	}
if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&	if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
(defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {	(defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};	my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};

&tracetable($hash{'map_start_'.$hash{'src_'.$rid}},	&tracetable($hash{'map_start_'.$hash{'src_'.$rid}},
'&'.$frid.'&');	'&'.$frid.'&');

if ($hash{'src_'.$frid}) {	$cols[$#cols+1]=($P_Order+1).':'.$frid;
if ($hash{'src_'.$frid}=~
/\.(problem\|exam\|quiz\|assess\|survey\|form)$/) {	my $meta=$hash{'src_'.$frid};
$cols[$#cols+1]=$frid;	my $PartNo = 0;
$mapsort[$HWN] .= '&'.$frid;	if ($meta) {
}	if ($meta=~/\.(problem\|exam\|quiz\|assess\|survey\|form)$/) {
}	foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
	if ($_=~/^stores\_(\d+)\_tries$/) {
	&Apache::lonnet::metadata($meta,$_.'.part');
	$P_Order++;
	$mapsort{$HWN} .= '&'.$P_Order;
	$PartNo++;
	$r->print('<br>'.$PartNo.'---'.$P_Order);
	}
	}
	}
	}
}	}
} else {	} else {
if ($hash{'src_'.$rid}) {	$cols[$#cols+1]=($P_Order+1).':'.$rid;
if ($hash{'src_'.$rid}=~	my $meta=$hash{'src_'.$rid};
/\.(problem\|exam\|quiz\|assess\|survey\|form)$/) {	my $PartNo = 0;
$cols[$#cols+1]=$rid;	if ($meta) {
$mapsort[$HWN] .= '&'.$rid;	if ($meta=~/\.(problem\|exam\|quiz\|assess\|survey\|form)$/) {
}	foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
}	if ($_=~/^stores\_(\d+)\_tries$/) {
	&Apache::lonnet::metadata($meta,$_.'.part');
	$P_Order++;
	$mapsort{$HWN} .= '&'.$P_Order;
	$PartNo++;
	}
	}
	}
	}
}	}
if (defined($hash{'to_'.$rid})) {	if (defined($hash{'to_'.$rid})) {
map {	foreach (split(/\,/,$hash{'to_'.$rid})){
&tracetable($hash{'goesto_'.$_},$beenhere);	&tracetable($hash{'goesto_'.$_},$beenhere);
} split(/\,/,$hash{'to_'.$rid});	}
}	}
}	}
}	}
Line 528 sub MySort {	Line 565 sub MySort {

sub Build_Statistics {	sub Build_Statistics {
$r->print(<<ENDPOP);	$r->print(<<ENDPOP);
<script>	<script>
popwin=open('','popwin','width=400,height=100');	popwin=open('','popwin','width=400,height=100');
popwin.document.writeln('<html><body bgcolor="#8cee8c">'+	popwin.document.writeln('<html><body bgcolor="#7777EE">'+
'<title>LON-CAPA Statistics</title>'+	'<title>LON-CAPA Statistics</title>'+
'<h4>Computation Progress</h4>'+	'<h4>Computation Progress</h4>'+
'<form name=popremain>'+	'<form name=popremain>'+
'<input type=text size=35 name=remaining value=Starting></form>'+	'<input type=text size=35 name=remaining value=Starting></form>'+
'</body></html>');	'</body></html>');
popwin.document.close();	popwin.document.close();
</script>	</script>
ENDPOP	ENDPOP

$r->rflush();	$r->rflush();
Line 556 ENDPOP	Line 593 ENDPOP
$r->print('<script>popwin.close()</script>');	$r->print('<script>popwin.close()</script>');
$r->rflush();	$r->rflush();
# -------------------- sorting the Data	# -------------------- sorting the Data
@list = sort(@list);	@list = sort (@list);

$OpSel2='';	$OpSel2='';
$OpSel1='selected';	$OpSel1='selected';

Line 567 ENDPOP	Line 605 ENDPOP
my $ResId;	my $ResId;
my $NoElements = $#list + 1;	my $NoElements = $#list + 1;
#-------------------------------- loop for data representation	#-------------------------------- loop for data representation
while ( $nIdx < $NoElements ) {	foreach (sort keys %mapsort) {
my %storestats=();	my ($Hid,$pr)=split(/\:/,$mapsort{$_});
my ($Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]);	my @lpr=split(/\&/,$pr);
my $Temp = $Prob;	&CreateTable(1,$Hid);
my $MxTries = 0;	for (my $i=1; $i<=$#lpr; $i++) {
my $TotalTries = 0;	my %storestats=();
my $YES = 0;	my ($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]);
my $Incorrect = 0;	my $Temp = $Prob;
my $Override = 0;	my $MxTries = 0;
my $StdNo = 0;	my $TotalTries = 0;
my @StdLst;	my $YES = 0;
do {	my $Incorrect = 0;
$nIdx++;	my $Override = 0;
$StdNo++;	my $StdNo = 0;
$StdLst[ $StdNo ] = $Tries;	my @StdLst;
$TotalTries += $Tries;	while ( $PrOrd == $lpr[$i] )
if ( $MxTries < $Tries ) { $MxTries = $Tries; }	{
if ( $Code eq 'C' ){ $YES++; }	$nIdx++;
elsif( $Code eq 'I' ) { $Incorrect++; }	$StdNo++;
elsif( $Code eq 'O' ) { $Override++; }	$StdLst[ $StdNo ] = $Tries;
elsif( $Code eq 'U' ) { $StdNo--; }	$TotalTries += $Tries;
($Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]);	if ( $MxTries < $Tries ) { $MxTries = $Tries; }
} while ( $Prob eq $Temp && $nIdx < $NoElements );	if ( $Code eq 'C' ){ $YES++; }
	elsif( $Code eq 'I' ) { $Incorrect++; }
$p_count++;	elsif( $Code eq 'O' ) { $Override++; }
	elsif( $Code eq 'U' ) { $StdNo--; }
($Temp,$ResId)=split(/\*/,$Temp);	($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]);
	}

	$p_count++;
	my $Dummy;
	($ResId,$Dummy)=split(/\*/,$Temp);

$Temp = '<a href="'.$hash{'src_'.$ResId}.'" target="_blank">'.$Temp.'</a>';	$Temp = '<a href="'.$hash{'src_'.$ResId}.
	'" target="_blank">'.$hash{'title_'.$ResId}.$Dummy.'</a>';

my $res = &Apache::lonnet::declutter($hash{'src_'.$ResId});	my $res = &Apache::lonnet::declutter($hash{'src_'.$ResId});
my $urlres=$res;	my $urlres=$res;

$ResId=~/(\d+)\.(\d+)/;	$ResId=~/(\d+)\.(\d+)/;
my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );	my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );
$urlres=$Map;	$urlres=$Map;

	$res = '<a href="'.$hash{'src_'.$ResId}.'">'.$res.'</a>';
$res = '<a href="'.$hash{'src_'.$ResId}.'">'.$res.'</a>';	#$Map = '<a href="'.$Map.'">'.$res.'</a>';

#$Map = '<a href="'.$Map.'">'.$res.'</a>';

#------------------------ Compute the Average of Tries about one problem	#------------------------ Compute the Average of Tries about one problem
my $Average = ($StdNo) ? $TotalTries/$StdNo : 0;	my $Average = ($StdNo) ? $TotalTries/$StdNo : 0;

$storestats{$ENV{'request.course.id'}.'___'.$urlres.'___timestamp'}=time;	$storestats{$ENV{'request.course.id'}.'___'.$urlres.'___timestamp'}=time;
$storestats{$ENV{'request.course.id'}.'___'.$urlres.'___stdno'}=$StdNo;	$storestats{$ENV{'request.course.id'}.'___'.$urlres.'___stdno'}=$StdNo;
$storestats{$ENV{'request.course.id'}.'___'.$urlres.'___avetries'}=$Average;	$storestats{$ENV{'request.course.id'}.'___'.$urlres.'___avetries'}=$Average;

#-------------------------------- Compute percentage of Wrong tries	#-------------------------------- Compute percentage of Wrong tries
my $Wrong = ( $StdNo ) ? 100 * ( $Incorrect / $StdNo ) : 0;	my $Wrong = ( $StdNo ) ? 100 * ( $Incorrect / $StdNo ) : 0;

#-------------------------------- Compute Standard Deviation	#-------------------------------- Compute Standard Deviation
my $StdDev = 0;	my $StdDev = 0;
if ( $StdNo > 1 ) {	if ( $StdNo > 1 ) {
for ( my $n = 0; $n < $StdNo; $n++ ) {	for ( my $n = 0; $n < $StdNo; $n++ ) {
my $Dif = $StdLst[ $n ]-$Average;	my $Dif = $StdLst[ $n ]-$Average;
$StdDev += $Dif*$Dif;	$StdDev += $Dif*$Dif;
}	}
$StdDev /= ( $StdNo - 1 );	$StdDev /= ( $StdNo - 1 );
$StdDev = sqrt( $StdDev );	$StdDev = sqrt( $StdDev );
}	}

#-------------------------------- Compute Degree of Difficulty	#-------------------------------- Compute Degree of Difficulty
my $DoDiff = 0;	my $DoDiff = 0;
if( $TotalTries > 0 ) {	if( $TotalTries > 0 ) {
$DoDiff = 1 - ( ( $YES + $Override ) / $TotalTries );	$DoDiff = 1 - ( ( $YES + $Override ) / $TotalTries );
# $DoDiff = ($TotalTries)/($YES + $Override+ 0.1);	# $DoDiff = ($TotalTries)/($YES + $Override+ 0.1);
}	}

$storestats{$ENV{'request.course.id'}.'___'.$urlres.'___difficulty'}=$DoDiff;	$storestats{$ENV{'request.course.id'}.'___'.$urlres.'___difficulty'}=$DoDiff;

#-------------------------------- Compute the Skewness	#-------------------------------- Compute the Skewness
my $Skewness = 0;	my $Skewness = 0;
my $Sum = 0;	my $Sum = 0;
if ( $StdNo > 0 && $StdDev > 0 ) {	if ( $StdNo > 0 && $StdDev > 0 ) {
for ( my $n = 0; $n < $StdNo; $n++ ) {	for ( my $n = 0; $n < $StdNo; $n++ ) {
my $Dif = $StdLst[ $n ]-$Average;	my $Dif = $StdLst[ $n ]-$Average;
$Skewness += $Dif$Dif$Dif;	$Skewness += $Dif$Dif$Dif;
}	}
$Skewness /= $StdNo;	$Skewness /= $StdNo;
$Skewness /= $StdDev$StdDev$StdDev;	$Skewness /= $StdDev$StdDev$StdDev;
}	}
#----------------- Some restition in presenting the float numbers	#----------------- Some restition in presenting the float numbers
my $Avg = sprintf( "%.2f", $Average );	my $Avg = sprintf( "%.2f", $Average );
my $Wrng = sprintf( "%.1f", $Wrong );	my $Wrng = sprintf( "%.1f", $Wrong );
my $SD = sprintf( "%.1f", $StdDev );	my $SD = sprintf( "%.1f", $StdDev );
my $DoD = sprintf( "%.2f", $DoDiff );	my $DoD = sprintf( "%.2f", $DoDiff );
my $Sk = sprintf( "%.1f", $Skewness );	my $Sk = sprintf( "%.1f", $Skewness );
	my $join = $PrOrd.':'.$Temp.':'.$StdNo.':'.
$CachData{($p_count-1)}=$Temp.':'.$StdNo.':'.$TotalTries.':'.	$TotalTries.':'.$MxTries.':'.$Avg.':'.
$MxTries.':'.$Avg.':'.$YES.':'.	$YES.':'.$Override.':'.$Wrng.':'.$DoD.':'.
$Override.':'.$Wrng.':'.$SD.':'.	$SD.':'.$Sk.':'.$Map.':'.$Prob;
$Sk.':'.$DoD.':'.$Map.':'.$Prob;	$CachData{($p_count-1)}=$join;

$urlres=~/^(\w+)\/(\w+)/;	$urlres=~/^(\w+)\/(\w+)/;
if ($StdNo) {	if ($StdNo) {
&Apache::lonnet::put('resevaldata',\%storestats,$1,$2);	&Apache::lonnet::put('resevaldata',\%storestats,$1,$2);
}	}

#-------------------------------- Row of statistical table	#-------------------------------- Row of statistical table
if ( $DiscFlag == 0 ) {	if ( $DiscFlag == 0 ) {
$r->print( "\n".'<tr>'.	&TableRow($join,$i,($p_count-1));
"\n".'<td>'.$p_count.'</td>'.	}
"\n".'<td>'.$Temp.'</td>'.	}
"\n".'<td>'.$StdNo.'</td>'.	&CloseTable();
"\n".'<td>'.$TotalTries.'</td>'.
"\n".'<td>'.$MxTries.'</td>'.
"\n".'<td>'.$Avg.'</td>'.
"\n".'<td>'.$YES.'</td>'.
"\n".'<td>'.$Override.'</td>'.
"\n".'<td>'.$Wrng.'</td>'.
"\n".'<td>'.$SD.'</td>'.
"\n".'<td>'.$Sk.'</td>'.
"\n".'<td>'.$DoD.'</td>'.
"\n".'<td>'.$Map.'</td>'.
"\n".'</tr>' );
$GraphDat{$nIdx}=$DoD.':'.$Wrng;
}
}	}
}	}


sub Cache_Statistics {	sub Cache_Statistics {
my @list = ();	my @list = ();
my $Useful;	my $Useful;
my $UnUseful;	my $UnUseful;
my %myHeader = reverse( %Header );	my %myHeader = reverse( %Header );
$Pos = $myHeader{$ENV{'form.sort'}};	$Pos = $myHeader{$ENV{'form.sort'}};
	if ($Pos > 0) {$Pos++;}
$p_count = 0;	$p_count = 0;

foreach my $key( keys %CachData) {	foreach my $key( keys %CachData) {
my @Temp=split(/\:/,$CachData{$key});	my @Temp=split(/\:/,$CachData{$key});
if ( $Pos == 0 \|\| $Pos == 11 ) {	if ( $Pos == 0 \|\| $Pos == 11 ) {
Line 712 sub Cache_Statistics {	Line 739 sub Cache_Statistics {

@list = sort MySort (@list);	@list = sort MySort (@list);

for ( my $nIdx = 0; $nIdx < $p_count; $nIdx++ ) {	my $nIdx=0;
my( $Pre, $Post ) = split(/\&/,$list[$nIdx]);
my ($Temp,$StdNo,$TotalTries,$MxTries,$Avg,$YES,	if ( $Pos == 0 ) {
$Override,$Wrng,$SD,$Sk,$DoD,$res,$Prob)=split(/\:/,$Post);	foreach (sort keys %mapsort) {
$r->print( "\n".'<tr>'.	my ($Hid,$pr)=split(/\:/,$mapsort{$_});
"\n".'<td>'.($nIdx+1).'</td>'.	&CreateTable(1,$Hid);
"\n".'<td bgcolor="#FFFFFF">'.$Temp.'</td>'.	my @lpr=split(/\&/,$pr);
"\n".'<td>'.$StdNo.'</td>'.	for (my $i=1; $i<=$#lpr; $i++) {
"\n".'<td>'.$TotalTries.'</td>'.	my($Pre, $Post) = split(/\&/,$list[$nIdx]);
"\n".'<td>'.$MxTries.'</td>'.	&TableRow($Post,$i,$nIdx);
"\n".'<td>'.$Avg.'</td>'.	$nIdx++;
"\n".'<td>'.$YES.'</td>'.	}
"\n".'<td>'.$Override.'</td>'.	&CloseTable();
"\n".'<td>'.$Wrng.'</td>'.	}
"\n".'<td>'.$SD.'</td>'.	}
"\n".'<td>'.$Sk.'</td>'.	else {
"\n".'<td>'.$DoD.'</td>'.	&CreateTable(0);
"\n".'<td>'.$res.'</td>'.	for ( my $nIdx = 0; $nIdx < $p_count; $nIdx++ ) {
	my($Pre, $Post) = split(/\&/,$list[$nIdx]);
	&TableRow($Post,$nIdx,$nIdx);
	}
	&CloseTable();
	}
	}

	sub TableRow {
	my ($Str,$Idx,$RealIdx)=@_;
	my($PrOrd,$Temp,$StdNo,$TotalTries,$MxTries,$Avg,$YES,
	$Override,$Wrng,$DoD,$SD,$Sk,$res,$Prob)=split(/\:/,$Str);
	$r->print( "\n".'<tr>'.
	"\n".'<td>'.($RealIdx+1).'</td>'.
	"\n".'<td bgcolor="#FFFFFF">'.$Temp.'</td>'.
	"\n".'<td bgcolor="#EEFFDD"> '.$StdNo.'</td>'.
	"\n".'<td bgcolor="#EEFFDD">'.$TotalTries.'</td>'.
	"\n".'<td bgcolor="#EEFFDD">'.$MxTries.'</td>'.
	"\n".'<td bgcolor="#DDFFFF">'.$Avg.'</td>'.
	"\n".'<td bgcolor="#DDFFFF"> '.$YES.'</td>'.
	"\n".'<td bgcolor="#DDFFFF"> '.$Override.'</td>'.
	"\n".'<td bgcolor="#FFDDDD"> '.$Wrng.'</td>'.
	"\n".'<td bgcolor="#FFDDDD">'.$DoD.'</td>'.
	"\n".'<td bgcolor="#DDFFDD"> '.$SD.'</td>'.
	"\n".'<td bgcolor="#DDFFDD"> '.$Sk.'</td>'.
	# "\n".'<td>'.$res.'</td>'.
"\n".'</tr>' );	"\n".'</tr>' );
$GraphDat{$nIdx}=$DoD.':'.$Wrng;	$GraphDat{$RealIdx}=$DoD.':'.$Wrng;
}
}	}

# ------------------------------------------- Prepare data for Graphical chart	# ------------------------------------------- Prepare data for Graphical chart
Line 794 sub initial {	Line 845 sub initial {
undef $p_count;	undef $p_count;
undef $Pos;	undef $Pos;
undef $GData;	undef $GData;
	$DiscFlag=0;
	$P_Order=100000;
	$HWN=$P_Order;
}	}


Line 839 sub ClassList {	Line 893 sub ClassList {
# --------------- Find all assessments and put them into some linear-like order	# --------------- Find all assessments and put them into some linear-like order
&tracetable($firstres,'&'.$lastres.'&');	&tracetable($firstres,'&'.$lastres.'&');

#my $c=0;	# my $c=0;
#foreach(@mapsort) {	# foreach (sort keys %mapsort) {
	# $r->print('<br>'.$c.')'.$_.' ... '.$mapsort{$_});
	# $c++;
	# }
	#foreach(@cols) {
# $c++;	# $c++;
# $r->print('<br>'.$mapsort[$c]);	# $r->print('<br>'.$cols[$c]);
#}	#}
#$r->print('<br> Count = '.$c);	#$r->print('<br> Count = '.$c);

Line 952 sub GetStatus {	Line 1010 sub GetStatus {

if ( $ENV{'form.order'} eq 'Descending' ) { $OpSel2='selected'; }	if ( $ENV{'form.order'} eq 'Descending' ) { $OpSel2='selected'; }
else { $OpSel1 = 'selected'; }	else { $OpSel1 = 'selected'; }

	my %myHeader = reverse( %Header );
	$Pos = $myHeader{$ENV{'form.sort'}};
	if ($Pos == 0) {
	$OpSel1 = 'selected';
	$ENV{'form.order'}='Ascendig';
	}

$CurMap = $ENV{'form.maps'};	$CurMap = $ENV{'form.maps'};
if ( $CurMap eq '' ) {	if ( $CurMap eq '' ) {
$CurMap = 'All Maps';	$CurMap = 'All Maps';

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	Added in v.1.5