version 1.19, 2003/01/13 00:07:51
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version 1.23, 2003/10/09 15:56:41
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# http://www.lon-capa.org/ |
# http://www.lon-capa.org/ |
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# The LearningOnline Network with CAPA |
# The LearningOnline Network with CAPA |
# Behrouz Minaei |
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# YEAR=2001 |
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# 9/13/01, 9/25/01, 10/6/01, 10/9/01, 12/25/01 |
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# YEAR=2002 |
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# 2/1/, 5/13, 5/15 |
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# YEAR=2003 |
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# 1/7/ |
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# A CGI script that dynamically outputs a graphical chart for lonstatistics. |
# A CGI script that dynamically outputs a graphical chart for lonstatistics. |
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# |
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#### |
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=pod |
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=head1 NAME |
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graph.png |
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=head1 SYNOPSIS |
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produces plots based on input |
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=head1 DESCRIPTION |
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graph.png is a cgi-bin script which produces plots based on input data. |
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The query string is expected to be as follows (without whitespace): |
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escape(Plot title) & escape(X label)& escape(Y label) & Maximum Y value & |
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Number of bars & $data1 & $data2 |
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$data1 and $data2 are expected to be comma seperated lists of numbers. |
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escape( value ) means the values must be run through lonnet::escape. |
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=cut |
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use strict; |
use strict; |
use GD::Graph::bars; |
use GD::Graph::bars; |
use GD::Graph::colour; |
use GD::Graph::colour; |
use GD::Graph::Data; |
use GD::Graph::Data; |
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sub unescape { |
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my $str=shift; |
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$str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; |
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return $str; |
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} |
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$|=1; # Autoflush after each print/write |
$|=1; # Autoflush after each print/write |
my ($Titr,$xlab,$ylab,$Max,$PNo,$data1,$data2)=split(/&/,$ENV{'QUERY_STRING'}); |
my ($Titr,$xlab,$ylab,$Max,$NumBars,$data1,$data2)=split(/&/,$ENV{'QUERY_STRING'}); |
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$Titr = &unescape($Titr); |
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$xlab = &unescape($xlab); |
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$ylab = &unescape($ylab); |
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my @data11=split(/\,/,$data1); |
my @data11=split(/\,/,$data1); |
my @data12=split(/\,/,$data2); |
my @data12=split(/\,/,$data2); |
my $skip_x = 1; |
my $skip_x = 1; |
my $bar_space=10; |
#my $bar_space=1; |
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my $bar_width=10; |
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my @xlabels; |
my @xlabels; |
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if ($Titr =~ /^Percentage$/){ |
for (my $nIdx=0; $nIdx<$NumBars; $nIdx++ ) { |
for (my $nIdx=0; $nIdx<$PNo; $nIdx++ ) { |
$xlabels[$nIdx]=$nIdx+1; |
$xlabels[$nIdx]=$nIdx; |
} |
} |
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@data11=(); |
#if ($Titr =~ /^Percentage$/){ |
@data11=split(/\,/,$data2); |
# for (my $nIdx=0; $nIdx<$NumBars; $nIdx++ ) { |
@data12=(); |
# $xlabels[$nIdx]=$nIdx; |
$Titr = ''; |
# } |
} else { |
# @data11=(); |
for (my $nIdx=0; $nIdx<$PNo; $nIdx++ ) { |
# @data11=split(/\,/,$data2); |
$xlabels[$nIdx]=$nIdx+1; |
# @data12=(); |
} |
# $Titr = ''; |
} |
#} else { |
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#} |
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my @data =(\@xlabels,\@data11,\@data12); |
my @data =(\@xlabels,\@data11,\@data12); |
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my $Range1; |
my $width; |
my $Range2; |
my $height = 200; |
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if ($xlab=~/^Concepts$/){ |
if ($NumBars < 10) { |
$Range1=270; |
$width = 120+$NumBars*15; |
$Range2=200; |
$skip_x = 1; |
} elsif ($xlab=~/^Problem_number$/){ |
$bar_width = 15; |
$Range1=450; |
} elsif ($NumBars <= 25) { |
$Range2=200; |
$width = 120+$NumBars*11; |
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$skip_x = 5; |
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$bar_width = 8; |
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} elsif ($NumBars <= 50) { |
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$width = 120+$NumBars*8; |
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$skip_x = 5; |
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$bar_width = 4; |
} else { |
} else { |
$Range1=800;#*$PNo; |
$width = 120+$NumBars*8; |
$Range2=200; |
$skip_x = 5; |
$skip_x=5; |
$bar_width = 4; |
$bar_space=1; |
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} |
} |
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my $x_tick_offset = 0; |
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if ($skip_x > 1) { |
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$x_tick_offset = $skip_x - 1; |
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} |
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my $MyGraph = GD::Graph::bars->new($Range1,$Range2); |
my $MyGraph = GD::Graph::bars->new($width,$height); |
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$MyGraph->set( |
$MyGraph->set( |
x_label => $xlab, |
x_label => $xlab, |
y_label => $ylab, |
y_label => $ylab, |
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x_label_position => 0.5, |
long_ticks => 1, |
long_ticks => 1, |
tick_length => 0, |
tick_length => 0, |
x_ticks => 0, |
x_ticks => 0, |
title => $Titr, |
title => $Titr, |
y_max_value => $Max, |
y_max_value => $Max, |
# y_tick_number => $ytic, |
# y_tick_number => $ytic, |
y_label_skip => 5, |
# y_label_skip => 5, |
x_label_skip => $skip_x, |
x_label_skip => $skip_x, |
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x_tick_offset => $x_tick_offset, |
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dclrs => [ qw( lgreen dgreen lyellow lpurple cyan lorange)], |
dclrs => [ qw( lgreen dgreen lyellow lpurple cyan lorange)], |
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bar_width => $bar_width, |
bar_spacing => $bar_space, |
# bar_spacing => $bar_space, |
cumulate => 2, |
cumulate => 2, |
zero_axis => 1, |
zero_axis => 1, |
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