[LON-CAPA-cvs] cvs: modules /gerd/discussions studeval.pl

[www]

www		Sun Apr 10 19:01:25 2005 EDT

  Added files:                 
    /modules/gerd/discussions	studeval.pl 
  Log:
  Analyze discussions by student
  
  

Index: modules/gerd/discussions/studeval.pl
+++ modules/gerd/discussions/studeval.pl
use strict;
# 
# Discussions:
# 1: emotional pos
# 2: emotional neg
# 3: surface ques
# 4: surface answ
# 5: proc ques
# 6: proc answ
# 7: concept ques
# 8: concept answ
# a: unrel
# b: solution
# c: math
# d: physics
#

my @q=();
# index into the array

my $course=0;
my $grade=1;
my $gender=2;
my %disc=();
for (my $i=1; $i<=8; $i++) {
    $disc{$i.'a'}=2+$i;
    $disc{$i.'b'}=10+$i;
    $disc{$i.'c'}=18+$i;
    $disc{$i.'d'}=26+$i;
}
my $sumall=35;

#
# Read Files
#

foreach my $class ('LBS271byperson') {
    print "\nReading $class";
    open(IN,'raw/'.$class.'.csv');
    my $num=0;
    my $numdisc=0;
    while (my $line=<IN>) {
        my $thisnumdisc=0;
	$line=~s/\s+$//;
        my @entries=split(/\,/,$line);
        if ($entries[1]!~/^[mf]$/) { next; }
        if ($entries[2]) {
	    unless ($entries[2]=~/^(\d[a-d])+$/) {
                print "\nError $class: $entries[2]\n";
	    }
	}
        $num++;
        my @newentry=($class,$entries[0],$entries[1]);
        for (my $i=3;$i<=34;$i++) { $newentry[$i]=0; }
        for (my $i=0;$i<length($entries[2]);$i+=2) {
            my $qtype=substr($entries[2],$i,2);
	    $newentry[$disc{$qtype}]++;
            $numdisc++;
            $thisnumdisc++;

	}
        $newentry[$sumall]=$thisnumdisc;
        push @q,join(',',@newentry);
    }
    close(IN);
    print "\n$class: $num students, $numdisc discussion items\n";
}
print "\nReading done.\n";

#
# Analysis
#
my %statmean=();
my %staterr=();
my %statsum=();
my %statn=();
my %statsumsquare=();

#
# Compute means and errors
#

foreach my $error (0,1) {
    foreach (@q) {
	my @entries=split(/\,/,$_);

   }
}

#
# Output
#

print "\n";


# ======== End analysis, subroutines

sub callsums {
    my ($which,$error,@entries)=@_;
    unless ($error) {
	&meansum($which,@entries);
    } else {        
	&meansumsquared($which,@entries);
    }
}

sub meansum {
   my ($which,@entries)=@_;
   unless ($entries[$sumall]) { return; }
   $statn{$which}++;
   my ($routine,$cat)=split(/\&/,$which);
   no strict 'refs';
   my $num=&$routine(@entries);
   use strict 'refs';
   $statsum{$which}+=$num/$entries[$sumall];
   if ($entries[$sumall]-&chat(@entries)) {
       $statn{$which.'&nochat'}++;
       $statsum{$which.'&nochat'}+=$num/($entries[$sumall]-&chat(@entries));
   }
}

sub meansumsquared {
   my ($which,@entries)=@_;
   unless ($entries[$sumall]) { return; }
   unless ($statn{$which}) { return; }
   my ($routine,$cat)=split(/\&/,$which);
   no strict 'refs';
   my $num=&$routine(@entries);
   use strict 'refs';
   $statsumsquare{$which}+=($num/$entries[$sumall]-$statsum{$which}/$statn{$which})**2;
   if ($entries[$sumall]-&chat(@entries)) {
       $statsumsquare{$which.'&nochat'}+=($num/($entries[$sumall]-&chat(@entries))-$statsum{$which.'&nochat'}/$statn{$which.'&nochat'})**2;
   }
}

sub reportout {
   my $which=shift;
   return &reportoutinner($which).','.&reportoutinner($which.'&nochat');
}

sub reportoutinner {
   my $which=shift;
   my $value='';
   if ($statn{$which}>0) {
       $value=&percent($statsum{$which}/$statn{$which});
   }
   my $error='';
   if ($statn{$which}>1) {
       $error=&percent(sqrt($statsumsquare{$which}/($statn{$which}*($statn{$which}-1))));
   }
   return &padded($value).','.&padded($error);
}

sub texreportout {
   my $which=shift;
   return &texreportoutinner($which).' ('.&texreportoutinner($which.'&nochat').')';
}

sub texreportoutinner {
   my $which=shift;
   my $value='';
   if ($statn{$which}>0) {
       $value=&texpercent($statsum{$which}/$statn{$which});
   }
   my $error='';
   if ($statn{$which}>1) {
       $error=&texpercent(sqrt($statsumsquare{$which}/($statn{$which}*($statn{$which}-1))));
   }
   return $value.'$\pm$'.$error;
}


sub padded {
   return substr('       '.shift,-5,5);
}
 
sub percent {
    my $val=shift;
   return int($val*1000+0.5)/10;
}

sub texpercent {
    my $val=shift;
   return int($val*100+0.5);
}

sub allcount {
   my @entries=@_;
   my $sum=0;
   for (my $i=3;$i<=34;$i++) {
      $sum+=$entries[$i];
   }
   return $sum;
}

sub solution {
   my @entries=@_;
   return &solution_question(@entries)
         +&solution_answer(@entries);
}

sub solution_question {
   my @entries=@_;
   return $entries[$disc{'3b'}]
         +$entries[$disc{'5b'}]
         +$entries[$disc{'7b'}];
}

sub solution_answer {
   my @entries=@_;
   return $entries[$disc{'4b'}]
         +$entries[$disc{'6b'}]
         +$entries[$disc{'8b'}];
}

sub procedural {
   my @entries=@_;
   return &procedural_question(@entries)
         +&procedural_answer(@entries);
}

sub procedural_question {
   my @entries=@_;
   return $entries[$disc{'5b'}]
         +$entries[$disc{'5c'}]
         +$entries[$disc{'5d'}];
}

sub procedural_answer {
   my @entries=@_;
   return $entries[$disc{'6b'}]
         +$entries[$disc{'6c'}]
         +$entries[$disc{'6d'}];
}

sub conceptual {
   my @entries=@_;
   return &conceptual_question(@entries)
         +&conceptual_answer(@entries);
}

sub conceptual_question {
   my @entries=@_;
   return $entries[$disc{'7b'}]
         +$entries[$disc{'7c'}]
         +$entries[$disc{'7d'}];
}

sub conceptual_answer {
   my @entries=@_;
   return $entries[$disc{'8b'}]
         +$entries[$disc{'8c'}]
         +$entries[$disc{'8d'}];
}

sub physics {
   my @entries=@_;
   return &physics_question(@entries)
         +&physics_answer(@entries);
}        

sub physics_question {
   my @entries=@_;
   return $entries[$disc{'3d'}]
         +$entries[$disc{'5d'}]
         +$entries[$disc{'7d'}];
}        

sub physics_answer {
   my @entries=@_;
   return $entries[$disc{'4d'}]
         +$entries[$disc{'6d'}]
         +$entries[$disc{'8d'}];
}        

sub math {
   my @entries=@_;
   return &math_question(@entries)
         +&math_answer(@entries);
}        

sub math_question {
   my @entries=@_;
   return $entries[$disc{'3c'}]
         +$entries[$disc{'5c'}]
         +$entries[$disc{'7c'}];
}        

sub math_answer {
   my @entries=@_;
   return $entries[$disc{'4c'}]
         +$entries[$disc{'6c'}]
         +$entries[$disc{'8c'}];
}        

sub emotion {
   my @entries=@_;
   return $entries[$disc{'1b'}]
         +$entries[$disc{'1c'}]
         +$entries[$disc{'1d'}]
         -$entries[$disc{'2b'}]
         -$entries[$disc{'2c'}]
         -$entries[$disc{'2d'}];
} 

sub chat {
   my @entries=@_;
   return $entries[$disc{'1a'}]
         +$entries[$disc{'2a'}]
         +$entries[$disc{'3a'}]
         +$entries[$disc{'4a'}]
         +$entries[$disc{'5a'}]
         +$entries[$disc{'6a'}]
         +$entries[$disc{'7a'}]
         +$entries[$disc{'8a'}]
	 +$entries[$disc{'1b'}]
	 +$entries[$disc{'2b'}]
	 +$entries[$disc{'1c'}]
	 +$entries[$disc{'2c'}]
	 +$entries[$disc{'1d'}]
	 +$entries[$disc{'2d'}];
}