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<?php
include("../header.php");
$user = $_SESSION['user'];
$sql = "select max(tmp.versuche) from ERROR_LOG join (SELECT LESSON_ID, count(lesson_ID) as VERSUCHE FROM error_log group by LESSon_ID)tmp on tmp.LESSON_ID=ERROR_LOG.LESSON_ID"; // wieviele Aufgabe sind derzeit aktiv
$stmt = dbconnect($sql);
OCIExecute($stmt);
$nrows = OCIFetchStatement($stmt,$results);
if ( $nrows == 1 )
{
OCIExecute($stmt);
while(OCIFetch($stmt))
{
$max = OCIResult($stmt, $results); // Anzahl der zu lösenden Aufgaben
}
}
$sql = "select LO.NR, VERSUCHE_insgesamt from LESSON_ORDER LO join (SELECT LESSON_ID, count(lesson_ID) as VERSUCHE_insgesamt FROM error_log group by LESSON_ID)tmp on LO.LESSON_ID=tmp.LESSON_ID order by LO.NR";
$stmt = dbconnect($sql);
OCIExecute($stmt);
?>
<tr >
<td><div class=titel_15>STATISTIK</div></td>
</tr>
<tr>
<td><br></td>
</tr>
<tr>
<td bgcolor=#e99900 colspan=2><div class=text><b>Überblick über die Lösungsversuche pro Aufgabe:</b></div></td>
</tr>
<tr>
<td>
<?
$nrows = OCIFetchStatement($stmt,$results); //Ergebnisse in Array eintragen...
if ( $nrows > 0 )
{
print "<BR><TABLE BORDER=\"1\" class=text>\n";
print "<TR>\n";
while ( list( $key, $val ) = each( $results ) )
{
print "<TH>$key</TH>\n";
}
print "</TR>\n";
for ( $i = 0; $i < $nrows; $i++ ) {
$col=0;
reset($results);
print "<TR>\n";
while ( $column = each($results) )
{
$data = $column['value'];
if ($col==1)
{
$percent = $data[$i] * 100/$max; //wieviel Prozent der aufgaben hat der Student gelöst
$width = $percent * 400/100; // Darstellung per Balkendiagramm
if ($percent <= 25)
print "<td width=500> <img src=\"/dipl/css/balken_gruen.gif\" width=$width height=10 > $data[$i] Anfragen</td>";
if ($percent > 25 and $percent < 50)
print "<td width=500> <img src=\"/dipl/css/balken_orange.gif\" width=$width height=10 > $data[$i] Anfragen</td>";
if ($percent >= 50)
print "<td width=500> <img src=\"/dipl/css/balken_rot.gif\" width=$width height=10 > $data[$i] Anfragen</td>";
}
else
print "<TD>$data[$i]</TD>\n";
$col++;
}
print "</TR>\n";
}
print "<tr><td colspan=3 class=text>Verteilung der Anzahl Anfragen nach Aufgaben.<BR></td></tr>";
print "</TABLE><BR>";
}
?>
<br><br>
</td>
</tr>
<tr>
<td colspan=2><div class=text> </div></td>
</tr>
<tr>
<td bgcolor=#e99900 colspan=2><div class=text><b>durchschnittlich zur Lösung benötigte Zeit in Tagen:</b>:</div></td>
</tr>
<tr>
<td colspan=2><div class=text> </div></td>
</tr>
<tr>
<td>
<?
$sql="select max(schnitt) from LESSON_ORDER LO join (select LESSON_ID, round(sum(time)/count(LESSON_ID),1) as schnitt from (select LESSON_ID, STUD_ID, max(datum) - min(datum) as time from (select stud_ID, datum, LESSON_ID from ERror_log union select stud_ID, datum, LESSON_ID from Logon) group by (LESSON_ID, STUD_ID)) group by LESSON_ID)tmp on LO.LESSON_ID=tmp.LESSON_ID order by LO.NR";
$stmt = dbconnect($sql);
OCIExecute($stmt);
$nrows = OCIFetchStatement($stmt,$results);
if ( $nrows == 1 )
{
OCIExecute($stmt);
while(OCIFetch($stmt))
{
$tagmax = OCIResult($stmt, $results); // Anzahl der zu lösenden Aufgaben
}
}
$sql="select LO.NR, schnitt as \"benötigte Zeit\" from LESSON_ORDER LO join (select LESSON_ID, round(sum(time)/count(LESSON_ID),1) as schnitt from (select LESSON_ID, STUD_ID, max(datum) - min(datum) as time from (select stud_ID, datum, LESSON_ID from ERror_log union select stud_ID, datum, LESSON_ID from Logon) group by (LESSON_ID, STUD_ID)) group by LESSON_ID)tmp on LO.LESSON_ID=tmp.LESSON_ID order by LO.NR";// benötigte Zeit ermitteln...
$stmt = dbconnect($sql);
OCIExecute($stmt);
$nrows = OCIFetchStatement($stmt,$results);
if ( $nrows > 0 )
{
print "<BR><TABLE BORDER=\"1\" class=text width=560>\n";
print "<TR>\n";
while ( list( $key, $val ) = each( $results ) )
{
print "<TH>$key</TH>\n";
}
print "</TR>\n";
for ( $i = 0; $i < $nrows; $i++ )
{
$col=0;
reset($results);
print "<TR>\n";
while ( $column = each($results) )
{
$data = $column['value'];
if ($col==1)
{
$wert = (float)(ereg_replace(",", ".", $data[$i])); // umwandeln in float
$percent = $wert * 100/$tagmax; //wieviel Prozent der aufgaben hat der Student gelöst
$width = $percent * 4;
if ($percent >= 0 and $percent <= 25)
print "<td width=500> <img src=\"/dipl/css/balken_gruen.gif\" width=$width height=10 > $wert Tage</td>";
if ($percent > 25 and $percent < 50)
print "<td width=500> <img src=\"/dipl/css/balken_orange.gif\" width=$width height=10 > $wert Tage</td>";
if ($percent >= 50)
print "<td width=500> <img src=\"/dipl/css/balken_rot.gif\" width=$width height=10 > $wert Tage</td>";
/*if ($percent == 0)
print "<td width=500> $wert Tage</td>";
if ($percent > 0 and $percent < 1)
print "<td width=500> <img src=\"/dipl/css/balken_rot.gif\" width=2 height=10 >$wert Tage</td>";*/
}
else
print "<TD>$data[$i]</TD>\n"; // Name und vorname ausgeben....
$col++;
}
print "</TR>\n";
}
}
else
{
if (isset($_GET['ID']))
{
$message = "Es sind noch keine Aufgaben gelöst worden....";
}
print "<tr><td class=text>" . $message . "<BR></tr></td>";
}
?>
</td>
</tr>
</table>
</table>
</table>
<?
include("../footer.php");
?>
|
