--- loncom/xml/lonplot.pm	2008/06/02 10:49:47	1.144
+++ loncom/xml/lonplot.pm	2008/06/03 10:49:00	1.145
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Dynamic plot
 #
-# $Id: lonplot.pm,v 1.144 2008/06/02 10:49:47 foxr Exp $
+# $Id: lonplot.pm,v 1.145 2008/06/03 10:49:00 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1050,7 +1050,7 @@ my %lookup =
       '(rdquo|#8221)'  => {'tex' => '\42',   'web' => "\x{201d}"}, # Right double quote.
       '(bdquo|#8222)'  => {'tex' => ',',              'web' => "\x{201e}"}, # Double low-9 quote.
       '(dagger|#8224)' => {'tex' => '+',   'web' => "\x{2020}"}, # Is this a dagger I see before me now?
-      '(Dagger|#8225)' => {'tex' => '\261}',   'web' => "\x{2021}"}, # it's handle pointing towards my heart?
+      '(Dagger|#8225)' => {'tex' => '\261',   'web' => "\x{2021}"}, # it's handle pointing towards my heart?
       '(bull|#8226)'   => {'tex' => '\267',           'web' => "\x{2022}"}, # Bullet.
       '(hellep|#8230)' => {'tex' => '{/Symbol \274}',   'web' => "\x{2026}"}, # Ellipses.
       '(permil|#8240)' => {'tex' => '%_o',            'web' => "\x{2031}"}, # Per mille.
@@ -1091,10 +1091,11 @@ my %lookup =
       '(empty|#8709)'   => {'tex' => '{/Symbol \306}',  'web' => "\x{2205}"}, # Null set.
       '(nabla|#8711)'   => {'tex' => '{/Symbol \321}',  'web' => "\x{2207}"}, # Gradient e.g.
       '(isin|#8712)'    => {'tex' => '{/Symbol \316}',  'web' => "\x{2208}"}, # Element of the set.
+      '(notin|#8713)'   => {'tex' => '{/Symbol \317}',  'web' => "\x{2209}"}, # Not an element of
       '(ni|#8715)'      => {'tex' => '{/Symbol \47}',   'web' => "\x{220b}"}, # Contains as a member
       '(prod|#8719)'    => {'tex' => '{/Symbol \325}',  'web' => "\x{220f}"}, # Product 
       '(sum|#8721)'     => {'tex' => '{/Symbol \345}',  'web' => "\x{2211}"}, # Sum of.
-      '(minus|#8722)'   => {'tex' => '-',               'web' => "\x{2212}"}, # - sign.
+      '(minus|#8722)'   => {'tex' => '{/Symbol \55}',   'web' => "\x{2212}"}, # - sign.
       '(lowast|#8727)'  => {'tex' => '*',               'web' => "\x{2217}"}, # * 
       '(radic|#8730)'   => {'tex' => '{/Symbol \326}',  'web' => "\x{221a}"}, # Square root. 
       '(prop|#8733)'    => {'tex' => '{/Symbol \265}',  'web' => "\x{221d}"}, # Proportional to.
@@ -1105,10 +1106,15 @@ my %lookup =
       '(cap|#8745)'     => {'tex' => '{/Symbol \307}',  'web' => "\x{2229}"}, # Set intersection.
       '(cup|#8746)'     => {'tex' => '{/Symbol \310}',  'web' => "\x{222a}"}, # Set union.
       '(int|8747)'      => {'tex' => '{/Symbol \362}',  'web' => "\x{222b}"}, # Integral.
-      '(there4|#8756)'  => {'tex' => '{/Symbol \134}',  'web' => "\x{2234}"}, # Therefore triple dots.
-      '(sim|#8764)'     => {'tex' => '~',               'web' => "\x{223c}"}, # Simlar to.
-      '(cong|#8773)'    => {'tex' => '{/Symbol \100}',  'web' => "\x{2245}"}, # Congruent to/with.
-      '(asymp|#8776)'   => {'tex' => '{/Symbol \278}',  'web' => "\x{2248}"}, # Asymptotic to.
+
+      # Some gnuplot guru will have to explain to me why the next three
+      # require the extra slashes... else they print very funkily.
+
+      '(there4|#8756)'  => {'tex' => '{/Symbol \\\134}',  'web' => "\x{2234}"}, # Therefore triple dots.
+      '(sim|#8764)'     => {'tex' => '\\\176',               'web' => "\x{223c}"}, # Simlar to.
+      '(cong|#8773)'    => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with.
+
+      '(asymp|#8776)'   => {'tex' => '{/Symbol \273}',  'web' => "\x{2248}"}, # Asymptotic to.
       '(ne|#8800)'      => {'tex' => '{/Symbol \271}',  'web' => "\x{2260}"}, # not equal to.
       '(equiv|#8801)'   => {'tex' => '{/Symbol \272}',  'web' => "\x{2261}"}, # Equivalent to.
       '(le|8804)'       => {'tex' => '{/Symbol \243}',  'web' => "\x{2264}"}, # Less than or equal to.
@@ -1129,8 +1135,12 @@ my %lookup =
       '(rceil|8969)'    => {'tex' => '{/Symbol \371}',  'web' => "\x{2309}"}, # Right ceiling.
       '(lfloor|8970)'   => {'tex' => '{/Symbol \353}',  'web' => "\x{230a}"}, # Left floor.
       '(rfloor|8971)'   => {'tex' => '{/Symbol \373}',  'web' => "\x{230b}"}, # Right floor.
-      '(lang|9001)'     => {'tex' => '{/Symbol \341}',  'web' => "\x{2329}"}, # Left angle bracket.
-      '(rang|9002)'     => {'tex' => '{/Symbol \361}',  'web' => "\x{232a}"}, # Right angle bracket.
+
+      # The gnuplot png font evidently does not have the big angle brackets at
+      # positions 0x2329, 0x232a so use ordinary brackets.
+
+      '(lang|9001)'     => {'tex' => '{/Symbol \341}',  'web' => '<'}, # Left angle bracket.
+      '(rang|9002)'     => {'tex' => '{/Symbol \361}',  'web' => '>'}, # Right angle bracket.
 
       # Gemoetric shapes.