--- loncom/xml/lonplot.pm	2007/08/03 20:48:01	1.126
+++ loncom/xml/lonplot.pm	2008/05/19 11:49:48	1.139
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Dynamic plot
 #
-# $Id: lonplot.pm,v 1.126 2007/08/03 20:48:01 albertel Exp $
+# $Id: lonplot.pm,v 1.139 2008/05/19 11:49:48 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -36,11 +36,10 @@ use Apache::response;
 use Apache::lonxml;
 use Apache::edit;
 use Apache::lonnet;
-use lib '/home/httpd/lib/perl/';
 use LONCAPA;
  
 
-use vars qw/$weboutputformat $versionstring/;
+use vars qw/$weboutputformat $version/;
 
 
 
@@ -49,8 +48,9 @@ BEGIN {
     #
     # Determine the version of GNUPLOT
     $weboutputformat = 'gif';
-    $versionstring = `gnuplot --version 2>/dev/null`;
-    if ($versionstring =~ /^gnuplot 4/) {
+    my $versionstring = `gnuplot --version 2>/dev/null`;
+    ($version) = ($versionstring =~ /^gnuplot ([\d.]+)/);
+    if ($version >= 4) {
         $weboutputformat = 'png';
     }
     
@@ -91,6 +91,12 @@ BEGIN {
 my $max_str_len = 50;    # if a label, title, xlabel, or ylabel text
                          # is longer than this, it will be truncated.
 
+my %linetypes =
+    (
+     solid          => 1,
+     dashed         => 0
+    );
+
 my %linestyles = 
     (
      lines          => 2,     # Maybe this will be used in the future
@@ -385,6 +391,13 @@ my %label_defaults =
 	 description => 'justification of the label text on the plot',
 	 edit_type   => 'choice',
 	 choices     => ['left','right','center']
+     },
+     rotate => {
+         default => 0,
+         test => $real_test,
+         description => 'Rotation of label (degrees)',
+         edit_type   => 'entry',
+         size        => '10',
      }
      );
 
@@ -435,7 +448,7 @@ my %tic_defaults =
 	 },         
      );
 
-my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
+my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat');
 my %axis_defaults = 
     (
      color   => {
@@ -472,10 +485,25 @@ my %axis_defaults =
 	 description => 'Maximum y-value shown in plot',	 
 	 edit_type   => 'entry',
 	 size        => '10'
-	 }
+        },
+     xformat      => {
+         default     => 'on',
+         test        => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
+         description => 'X-axis number formatting',
+         edit_type   => 'choice',
+         choices     => ['on', 'off', '2e', '2f'],
+         },
+     yformat      => {
+         default     => 'on',
+         test        => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
+         description => 'X-axis number formatting',
+         edit_type   => 'choice',
+         choices     => ['on', 'off', '2e', '2f'],
+         },
+
      );
 
-my @curve_edit_order = ('color','name','linestyle','linewidth','pointtype','pointsize','limit');
+my @curve_edit_order = ('color','name','linestyle','linewidth','linetype','pointtype','pointsize','limit');
 
 my %curve_defaults = 
     (
@@ -496,37 +524,44 @@ my %curve_defaults =
      linestyle => {
 	 default => 'lines',
 	 test => $linestyle_test,
-	 description => 'Line style',
+	 description => 'Plot with:',
 	 edit_type   => 'choice',
 	 choices     => [keys(%linestyles)]
 	 },
      linewidth => {
-         default     => 2,
+         default     => 1,
          test        => $int_test,
-         description => 'Line width (may not apply to all line styles)',
+         description => 'Line width (may not apply to all plot styles)',
          edit_type   => 'choice',
          choices     => [1,2,3,4,5,6,7,8,9,10]
          },
+     linetype => {
+         default     => 'solid',
+         test        => sub {$_[0]=~/^(solid|dashed)$/},
+         description => 'Line type (may not apply to all plot styles)',
+         edit_type   => 'choice',
+         choices     => ['solid', 'dashed']
+         }, 
      pointsize => {
          default     => 1,
          test        => $pos_real_test,
-         description => 'Point size (may not apply to all line styles)',
+         description => 'Point size (may not apply to all plot styles)',
          edit_type   => 'entry',
          size        => '5'
          },
      pointtype => {
          default     => 1,
          test        => $int_test,
-         description => 'Point type (may not apply to all line styles)',
+         description => 'Point type (may not apply to all plot styles)',
          edit_type   => 'choice',
          choices     => [0,1,2,3,4,5,6]
          },
      limit     => {
          default     => 'closed',
-	 test        => sub {$_[0]=~/^(closed|x1|x2|y1|y2)$/},
+	 test        => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/},
          description => 'Point to fill -- for filledcurves',
          edit_type   => 'choice',
-         choices     => ['closed','x1','x2','y1','y2']
+         choices     => ['above', 'below', 'closed','x1','x2','y1','y2']
          },
      );
 
@@ -757,6 +792,252 @@ sub end_key {
     return $result;
 }
 
+sub parse_label {
+    my ($target,$text) = @_;
+    my $parser=HTML::LCParser->new(\$text);
+    my $result;
+    while (my $token=$parser->get_token) {
+	if ($token->[0] eq 'S') {
+	    if ($token->[1] eq 'sub') {
+		$result .= '_{';
+	    } elsif ($token->[1] eq 'sup') {
+		$result .= '^{';
+	    } else {
+		$result .= $token->[4];
+	    }
+	} elsif ($token->[0] eq 'E') {
+	    if ($token->[1] eq 'sub'
+		|| $token->[1] eq 'sup') {
+		$result .= '}';
+	    } else {
+		$result .= $token->[2];
+	    }
+	} elsif ($token->[0] eq 'T') {
+	    $result .= &replace_entities($target,$token->[1]);
+	}
+    }
+    return $result;
+}
+
+
+my %lookup = 
+   (  # Greek alphabet:
+      
+      '(Alpha|#913)'    => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
+      '(Beta|#914)'    => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
+      '(Chi|#935)'     => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
+      '(Delta|#916)'   => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
+      '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
+      '(Phi|#934)'     => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
+      '(Gamma|#915)'   => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
+      '(Eta|#919)'     => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
+      '(Iota|#921)'    => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
+      '(Kappa|#922)'   => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
+      '(Lambda|#923)'  => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
+      '(Mu|#924)'      => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
+      '(Nu|#925)'      => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
+      '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
+      '(Pi|#928)'      => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
+      '(Theta|#920)'   => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
+      '(Rho|#929)'     => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
+      '(Sigma|#931)'   => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
+      '(Tau|#932)'     => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
+      '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
+      '(Omega|#937)'   => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
+      '(Xi|#926)'      => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
+      '(Psi|#936)'     => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
+      '(Zeta|#918)'    => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
+      '(alpha|#945)'   => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
+      '(beta|#946)'    => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
+      '(chi|#967)'     => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
+      '(delta|#948)'   => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
+      '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
+      '(phi|#966)'     => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
+      '(gamma|#947)'   => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
+      '(eta|#951)'     => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
+      '(iota|#953)'    => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
+      '(kappa|#954)'   => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
+      '(lambda|#955)'  => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
+      '(mu|#956)'      => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
+      '(nu|#957)'      => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
+      '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
+      '(pi|#960)'      => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
+      '(theta|#952)'   => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
+      '(rho|#961)'     => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
+      '(sigma|#963)'   => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
+      '(tau|#964)'     => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
+      '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
+      '(omega|#969)'   => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
+      '(xi|#958)'      => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
+      '(psi|#968)'     => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
+      '(zeta|#950)'    => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
+      '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"},
+      '(upsih|#978)'   => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"},
+      '(piv|#982)'     => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"},
+
+
+      # Punctuation:
+      
+      '(quot|#034)'   => {'tex' =>  '\42',            'web' => '\42'},
+      '(amp|#038)'    => {'tex' =>  '\46',            'web' => '\46'},
+      '(lt|#060)'     => {'tex' =>  '\74',            'web' => '\74'},
+      '(gt|#062)'     => {'tex' =>  '\76',            'web' => '\76'},
+      '#131'          => {'tex' =>  '{/Symbol \246}', 'web' => "\x{192}"},
+      '#132'          => {'tex' => '{/Text \271}',    'web' => "\x{201e}"},
+      '#133'          => {'tex' => '{/Symbol \274}',  'web'=> "\x{2026}"},
+      '#134'          => {'tex' => '{/Text \262}',    'web' => "\x{2020}"},
+      '#135'          => {'tex' => '{/Text \263}',    'web' => "\x{2021}"},
+      '#136'          => {'tex' => '\\\\^',           'web' => '\\\\^'},
+      '#137'          => {'tex' => '{/Text \275}',    'web' => "\x{2030}"},
+      '#138'          => {'tex' => 'S',               'web' => "\x{160}"}, # no S-caron in ps fonts.
+      '#139'          => {'tex' => '<',               'web' => '<'},
+      '#140'          => {'tex' => '{/Text \352}',    'web' => "\x{152}"},
+      '#145'          => {'tex' => '\140',            'web' => "\x{2018}"},
+      '#146'          => {'tex' => '\47',             'web' => "\x{2019}"},
+      '#147'          => {'tex' => '{/Text \252}',    'web' => "\x{201c}"},
+      '#148'          => {'tex' => '{/Text \315}',    'web' => '\\"'},
+      '#149'          => {'tex' => '{/Symbol \267}',  'web' => "\x{2022}"},
+      '#150'          => {'tex' => '{/Text \55}',     'web' => "\x{2013}"},  #Untested here en dash
+      '#151'          => {'tex' => '{/Symbol \55}',   'web' => "\x{2014}"},  # em dash
+      '#152'          => {'tex' => '~',               'web' => '~'},
+      '#153'          => {'tex' => '{/Text \324}',    'web' => "\x{2122}"}, # trademark
+
+      # Accented letters, and other furreign language glyphs.
+
+      '#154'          => {'tex' => 's',               'web' => "\x{161}"}, # small s-caron no ps.
+      '#155'          => {'tex' => '>',               'web' => '\76'},     # >
+      '#156'          => {'tex' => '{/Text \372}',    'web' => "\x{153}"}, # oe ligature.
+      '#159',         => {'tex' => 'Y',               'web' => "\x{178}"}, # Y-umlaut - can't print
+      '(nbsp|#160)'   => {'tex' => ' ',               'web' => ' '},       # non breaking space.
+      '(iexcl|#161)'  => {'tex' => '{/Text \241}',    'web' => "\x{a1}"},  # inverted !
+      '(cent|#162)'   => {'tex' => '{/Text \242}',    'web' => "\x{a2}"},  # Cent currency.
+      '(pound|#163}'  => {'tex' => '{/Text \243}',    'web' => "\x{a3}"},  # GB Pound currency.
+      '(curren|#164)' => {'tex' => '{/Text \250}',    'web' => "\x{a4}"},  # Generic currency symb.
+      '(yen|#165)'    => {'tex' => '{/Text \245}',    'web' => "\x{a5}"},  # Yen currency.
+      '(brvbar|#166)' => {'tex' => '{/Symbol \174}',  'web' => "\x{a6}"},  # Broken vert bar no print.
+      '(sect|#167)'   => {'tex' => '{\247}',          'web' => "\x{a7}"},  # Section symbol.
+      '(uml|#168)'    => {'tex' => '{\250}',          'web' => "\x{a8}"},  # 'naked' umlaut.
+      '(copy|#169)'   => {'tex' => '{/Symbol \343}',  'web' => "\x{a9}"},  # Copyright symbol.
+      '(ordf|#170)'   => {'tex' => '{/Text \343}',    'web' => "\x{aa}"},  # Feminine ordinal.
+      '(laquo|#171)'  => {'tex' => '{/Text \253}',    'web' => "\x{ab}"},  # << quotes.
+      '(not|#172)'    => {'tex' => '\254',            'web' => "\x{ac}"},  # Logical not.
+      '(shy|#173)'    => {'tex' => '-',               'web' => "\x{ad}"},  # soft hyphen.
+      '(reg|#174)'    => {'tex' => '{/Symbol \342}',  'web' => "\x{ae}"},  # Registered tm.
+      '(macr|#175)'   => {'tex' => '^{-}',            'web' => "\x{af}"},  # 'naked' macron (overbar).
+      '(deg|#176)'    => {'tex' => '{/Text \312}',    'web' => "\x{b0}"},  # Degree symbo..
+      '(plusmn|#177)' => {'tex' => '{/Symbol \261}',  'web' => "\x{b1}"},  # +/- symbol.
+      '(sup2|#178)'   => {'tex' => '^2',              'web' => "\x{b2}"},  # Superscript 2.
+      '(sup3|#179)'   => {'tex' => '^3',              'web' => "\x{b3}"},  # Superscript 3.
+      '(acute|#180)'  => {'tex' => '{/Text \302}',    'web' => "\x{b4}"},  # 'naked' acute accent.
+      '(micro|#181)'  => {'tex' => '{/Symbol \155}',  'web' => "\x{b5}"},  # Micro (small mu).
+      '(para|#182)'   => {'tex' => '{/Text \266}',    'web' => "\x{b6}"},  # Paragraph symbol.
+      '(middot|#183)' => {'tex' => '^.',              'web' => "\x{b7}"},  # middle dot (maybe text 267 is better)?
+      '(cedil|#184)'  => {'tex' => '\233',            'web' => "\x{b8}"},  # 'naked' cedilla.
+      '(sup1|#185)'   => {'tex' => '^1',              'web' => "\x{b9}"},  # superscript 1.
+      '(ordm|#186)'   => {'tex' => '\353',            'web' => "\x{ba}"},  # masculine ordinal.
+      '(raquo|#187)', => {'tex' => '\273',            'web' => "\x{bb}"},  # Right angle quotes.
+      '(frac14|#188)' => {'tex' => '\274',            'web' => "\x{bc}"},  # 1/4.
+      '(frac12|#189)' => {'tex' => '\275',            'web' => "\x{bd}"},  # 1/2.
+      '(frac34|#190)' => {'tex' => '\276',            'web' => "\x{be}"},  # 3/4
+      '(iquest|#191)' => {'tex' => '{/Text \277}',    'web' => "\x{bf}"},  # Inverted ?
+      '(Agrave|#192)' => {'tex' => '\300',            'web' => "\x{c0}"},  # A Grave.
+      '(Aacute|#193)' => {'tex' => '\301',            'web' => "\x{c1}"},  # A Acute.
+      '(Acirc|#194)'  => {'tex' => '\302',            'web' => "\x{c2}"},  # A Circumflex.
+      '(Atilde|#195)' => {'tex' => '\303',            'web' => "\x{c3}"},  # A tilde.
+      '(Auml|#196)'   => {'tex' => '\304',            'web' => "\x{c4}"},  # A umlaut.
+      '(Aring|#197)'  => {'tex' => '\305',            'web' => "\x{c5}"},  # A ring.
+      '(AElig|#198)'  => {'tex' => '\306',            'web' => "\x{c6}"},  # AE ligature.
+      '(Ccedil|#199)' => {'tex' => '\307',            'web' => "\x{c7}"},  # C cedilla
+      '(Egrave|#200)' => {'tex' => '\310',            'web' => "\x{c8}"},  # E Accent grave.
+      '(Eacute|#201)' => {'tex' => '\311',            'web' => "\x{c9}"},  # E acute accent.
+      '(Ecirc|#202)'  => {'tex' => '\312',            'web' => "\x{ca}"},  # E Circumflex.
+      '(Euml|#203)'   => {'tex' => '\313',            'web' => "\x{cb}"},  # E umlaut.
+      '(Igrave|#204)' => {'tex' => '\314',            'web' => "\x{cc}"},  # I grave accent.
+      '(Iacute|#205)' => {'tex' => '\315',            'web' => "\x{cd}"},  # I acute accent.
+      '(Icirc|#206)'  => {'tex' => '\316',            'web' => "\x{ce}"},  # I circumflex.
+      '(Iuml|#207)'   => {'tex' => '\317',            'web' => "\x{cf}"},  # I umlaut.
+      '(ETH|#208)'    => {'tex' => '\320',            'web' => "\x{d0}"},  # Icelandic Cap eth.
+      '(Ntilde|#209)' => {'tex' => '\321',            'web' => "\x{d1}"},  # Ntilde (enyan).
+      '(Ograve|#210)' => {'tex' => '\322',            'web' => "\x{d2}"},  # O accent grave.
+      '(Oacute|#211)' => {'tex' => '\323',            'web' => "\x{d3}"},  # O accent acute.
+      '(Ocirc|#212)'  => {'tex' => '\324',            'web' => "\x{d4}"},  # O circumflex.
+      '(Otilde|#213)' => {'tex' => '\325',            'web' => "\x{d5}"},  # O tilde.
+      '(Ouml|#214)'   => {'tex' => '\326',            'web' => "\x{d6}"},  # O umlaut.
+      '(times|#215)'  => {'tex' => '\327',            'web' => "\x{d7}"},  # Times symbol.
+      '(Oslash|#216)' => {'tex' => '\330',            'web' => "\x{d8}"},  # O slash.
+      '(Ugrave|#217)' => {'tex' => '\331',            'web' => "\x{d9}"},  # U accent grave.
+      '(Uacute|#218)' => {'tex' => '\332',            'web' => "\x{da}"},  # U accent acute.
+      '(Ucirc|#219)'  => {'tex' => '\333',            'web' => "\x{db}"},  # U circumflex.
+      '(Uuml|#220)'   => {'tex' => '\334',            'web' => "\x{dc}"},  # U umlaut.
+      '(Yacute|#221)' => {'tex' => '\335',            'web' => "\x{dd}"},  # Y accent acute.
+      '(THORN|#222)'  => {'tex' => '\336',            'web' => "\x{de}"},  # Icelandic thorn.
+      '(szlig|#223)'  => {'tex' => '\337',            'web' => "\x{df}"},  # German sharfes s.
+      '(agrave|#224)' => {'tex' => '\340',            'web' => "\x{e0}"},  # a accent grave.
+      '(aacute|#225)' => {'tex' => '\341',            'web' => "\x{e1}"},  # a grave.
+      '(acirc|#226)'  => {'tex' => '\342',            'web' => "\x{e2}"},  # a circumflex.
+      '(atilde|#227)' => {'tex' => '\343',            'web' => "\x{e3}"},  # a tilde.
+      '(auml|#228)'   => {'tex' => '\344',            'web' => "\x{e4}"},  # a umlaut
+      '(aring|#229)'  => {'tex' => '\345',            'web' => "\x{e5}"},  # a ring on top.
+      '(aelig|#230)'  => {'tex' => '\346',            'web' => "\x{e6}"},  # ae ligature.
+      '{ccedil|#231)' => {'tex' => '\347',            'web' => "\x{e7}"},  # C cedilla
+      '(egrave|#232)' => {'tex' => '\350',            'web' => "\x{e8}"},  # e accent grave.
+      '(eacute|#233)' => {'tex' => '\351',            'web' => "\x{e9}"},  # e accent acute.
+      '(ecirc|#234)'  => {'tex' => '\352',            'web' => "\x{ea}" }, # e circumflex.
+      '(euml|#235)'   => {'tex' => '\353',            'web' => "\x{eb}"},  # e umlaut.
+      '(igrave|#236)' => {'tex' => '\354',            'web' => "\x{ec}"},  # i grave.
+      '(iacute|#237}' => {'tex' => '\355',            'web' => "\x{ed}"},  # i acute.
+      '(icirc|#238}'  => {'tex' => '\356',            'web' => "\x{ee}"},  # i circumflex.
+      '(iuml|#239)'   => {'tex' => '\357',            'web' => "\x{ef}"},  # i umlaut.
+      '(eth|#240)'    => {'tex' => '\360',            'web' => "\x{f0}"},  # Icelandic eth.
+      '(ntilde|#241)' => {'tex' => '\361',            'web' => "\x{f1}"},  # n tilde.
+      '(ograve|#242)' => {'tex' => '\362',            'web' => "\x{f2}"},  # o grave.
+      '(oacute|#243)' => {'tex' => '\363',            'web' => "\x{f3}"},  # o acute.
+      '(ocirc'|#244)' => {'tex' => '\364',            'web' => "\x{f4}"},  # o circumflex.
+      '(otilde|#245)' => {'tex' => '\365',            'web' => "\x{f5}"},  # o tilde.
+      '(ouml|#246)'   => {'tex' => '\366',            'web' => "\x{f6}"},  # o umlaut.
+      '(divide|#247)' => {'tex' => '\367',            'web' => "\x{f7}"},  # division symbol
+      '(oslash|#248)' => {'tex' => '\370',            'web' => "\x{f8}"},  # o slashed.
+      '(ugrave|#249)' => {'tex' => '\371',            'web' => "\x{f9}"},  # u accent grave.
+      '(uacute|#250)' => {'tex' => '\372',            'web' => "\x{fa}"},  # u acute.
+      '(ucirc|#251)'  => {'tex' => '\373',            'web' => "\x{fb}"},  # u circumflex.
+      '(uuml|#252)'   => {'tex' => '\374',            'web' => "\x{fc}"},  # u umlaut.
+      '(yacute|#253)' => {'tex' => '\375',            'web' => "\x{fd}"},  # y acute accent.
+      '(thorn|#254)'  => {'tex' => '\376',            'web' => "\x{fe}"},  # small thorn (icelandic).
+      '(yuml|#255)'   => {'tex' => '\377',            'web' => "\x{ff}"},  # y umlaut.
+      
+      # Latin extended A entities:
+
+      '(OElig|#338)'  => {'tex' => '{/Text \352}',   'web' => "\x{152}"},  # OE ligature.
+      '(oelig|#339)'  => {'tex' => '{/Text \372}',   'web' => "\x{153}"},  # oe ligature.
+      '(Scaron|#352)' => {'tex' => 'S',              'web' => "\x{160}"},  # S caron no printable.
+      '(scaron|#353)' => {'tex' => 's',              'web' => "\x{161}"},  # s caron no printable.
+      '(Yuml|#376)'   => {'tex' => 'Y',              'web' => "\x{178}"},  # Y umlaut - no printable.
+
+      # Latin extended B.
+
+      '(fnof|#402)'  => {'tex' =>'{/Symbol 246}',    'web' => "\x{192}"},  # f with little hook.
+
+      # Standalon accents:
+
+      '(circ|#710)'  => {'tex' => '^',               'web' => '^'},        # circumflex.
+      '(tilde|#732)' => {'tex' => '~',               'web' => '~'},        # tilde.
+
+      
+
+    );
+
+
+sub replace_entities {
+    my ($target,$text) = @_;
+    $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
+    while (my ($re, $replace) = each(%lookup)) {
+	my $repl = $replace->{$target};
+	$text =~ s/&$re;/$replace->{$target}/g;
+    }
+    $text =~ s{(&)}{\\\\$1}g;
+    return $text;
+}
+
 ##------------------------------------------------------------------- title
 sub start_title {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
@@ -768,6 +1049,7 @@ sub start_title {
 	if (length($title) > $max_str_len) {
 	    $title = substr($title,0,$max_str_len);
 	}
+	$title = &parse_label($target,$title);
     } elsif ($target eq 'edit') {
 	$result.=&Apache::edit::tag_start($target,$token,'Plot Title');
 	my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
@@ -799,6 +1081,7 @@ sub start_xlabel {
 	if (length($xlabel) > $max_str_len) {
 	    $xlabel = substr($xlabel,0,$max_str_len);
 	}
+	$xlabel = &parse_label($target,$xlabel);
     } elsif ($target eq 'edit') {
 	$result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
 	my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
@@ -831,6 +1114,7 @@ sub start_ylabel {
 	if (length($ylabel) > $max_str_len) {
 	    $ylabel = substr($ylabel,0,$max_str_len);
 	}
+	$ylabel = &parse_label($target,$ylabel);
     } elsif ($target eq 'edit') {
 	$result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
 	my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
@@ -864,7 +1148,7 @@ sub start_label {
 	$text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
 	$text =~ s/\n/ /g;
 	$text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
-	$label{'text'} = $text;
+	$label{'text'} = &parse_label($target,$text);
 	push(@labels,\%label);
     } elsif ($target eq 'edit') {
 	$result .= &Apache::edit::tag_start($target,$token,'Plot Label');
@@ -1215,9 +1499,15 @@ sub write_gnuplot_file {
     if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
         $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
     }
+
     # tic scales
-    $gnuplot_input .= 'set ticscale '.
-        $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
+    if ($version > 4) {
+	$gnuplot_input .= 'set tics scale '.
+	    $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
+    } else {
+    	$gnuplot_input .= 'set ticscale '.
+	    $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
+    }
     #boxwidth
     if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
 	$gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
@@ -1271,6 +1561,22 @@ sub write_gnuplot_file {
     }
     # axis
     if (%axis) {
+        if ($axis{'xformat'} ne 'on') {
+            $gnuplot_input .= "set format x ";
+            if ($axis{'xformat'} eq 'off') {
+                $gnuplot_input .= "\"\"\n";
+            } else {
+                $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
+            }
+        }
+        if ($axis{'yformat'} ne 'on') {
+            $gnuplot_input .= "set format y ";
+            if ($axis{'yformat'} eq 'off') {
+                $gnuplot_input .= "\"\"\n";
+            } else {
+                $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
+            }
+        }
 	$gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
 	$gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
     }
@@ -1288,7 +1594,12 @@ sub write_gnuplot_file {
     my $label;
     foreach $label (@labels) {
 	$gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
-	    $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
+                          $label->{'xpos'}.','.$label->{'ypos'};
+        if ($label->{'rotate'} ne '') {
+            $gnuplot_input .= ' rotate by '.$label->{'rotate'};
+        }
+        $gnuplot_input .= ' '.$label->{'justify'};
+
         if ($target eq 'tex') {
 	    $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"' ;
         }
@@ -1311,7 +1622,6 @@ sub write_gnuplot_file {
 		$curve->{'function'}.' title "'.
 		$curve->{'name'}.'" with '.
                 $curve->{'linestyle'};
-            $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
 
             if (($curve->{'linestyle'} eq 'points')      ||
                 ($curve->{'linestyle'} eq 'linespoints') ||
@@ -1323,7 +1633,17 @@ sub write_gnuplot_file {
                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
             } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
                 $gnuplot_input.= ' '.$curve->{'limit'};
+            } elsif ($curve->{'linetype'} ne '' &&
+                     $curve->{'linestyle'} eq 'lines') {
+                $gnuplot_input.= ' linetype ';
+                $gnuplot_input.= $linetypes{$curve->{'linetype'}};
+                $gnuplot_input.= ' linecolor rgb "';
+                # convert color from xaaaaaa to #aaaaaa
+                $curve->{'color'} =~ s/^x/#/;
+                $gnuplot_input.= $curve->{'color'}.'"';
             }
+            $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
+
 	} elsif (exists($curve->{'data'})) {
 	    # Store data values in $datatext
 	    my $datatext = '';
@@ -1347,7 +1667,6 @@ sub write_gnuplot_file {
 	    $gnuplot_input.= '"'.$datafilename.'" title "'.
 		$curve->{'name'}.'" with '.
 		$curve->{'linestyle'};
-            $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
             if (($curve->{'linestyle'} eq 'points')      ||
                 ($curve->{'linestyle'} eq 'linespoints') ||
                 ($curve->{'linestyle'} eq 'errorbars')   ||
@@ -1358,11 +1677,21 @@ sub write_gnuplot_file {
                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
             } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
                 $gnuplot_input.= ' '.$curve->{'limit'};
+            } elsif ($curve->{'linetype'} ne '' &&
+                     $curve->{'linestyle'} eq 'lines') {
+                $gnuplot_input.= ' linetype ';
+                $gnuplot_input.= $linetypes{$curve->{'linetype'}};
+                $gnuplot_input.= ' linecolor rgb "';
+                # convert color from xaaaaaa to #aaaaaa
+                $curve->{'color'} =~ s/^x/#/;
+                $gnuplot_input.= $curve->{'color'}.'"';
             }
+                $gnuplot_input.= ' linewidth '.$curve->{'linewidth'}; 
 	}
     }
     # Write the output to a file.
-    my $fh=Apache::File->new(">$tmpdir$filename.data");
+    open (my $fh,">$tmpdir$filename.data");
+    binmode($fh, ":utf8");
     print $fh $gnuplot_input;
     close($fh);
     # That's all folks.