--- loncom/xml/lonplot.pm 2008/06/02 10:49:47 1.144 +++ loncom/xml/lonplot.pm 2014/07/09 15:17:32 1.152.6.1 @@ -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 1.152.6.1 2014/07/09 15:17:32 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -26,6 +26,9 @@ # http://www.lon-capa.org/ # + + + package Apache::lonplot; use strict; @@ -57,6 +60,8 @@ BEGIN { } +=pod + ## ## Description of data structures: ## @@ -88,6 +93,8 @@ BEGIN { ## ## ################################################################### +=cut + my $max_str_len = 50; # if a label, title, xlabel, or ylabel text # is longer than this, it will be truncated. @@ -448,7 +455,7 @@ my %tic_defaults = }, ); -my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat'); +my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero'); my %axis_defaults = ( color => { @@ -496,11 +503,26 @@ my %axis_defaults = yformat => { default => 'on', test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/}, - description => 'X-axis number formatting', + description => 'Y-axis number formatting', edit_type => 'choice', choices => ['on', 'off', '2e', '2f'], }, - + + xzero => { + default => 'off', + test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/}, + description => 'Show x-zero (y=0) axis', + edit_type => 'choice', + choices => ['off', 'line', 'thick-line', 'dotted'], + }, + + yzero => { + default => 'off', + test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/}, + description => 'Show y-zero (x=0) axis', + edit_type => 'choice', + choices => ['off', 'line', 'thick-line', 'dotted'], + }, ); my @curve_edit_order = ('color','name','linestyle','linewidth','linetype','pointtype','pointsize','limit'); @@ -757,6 +779,7 @@ sub get_font { $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}}; } if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) { +# $selected_font = $font_properties{'classic'}; $size = $Apache::lonplot::plot{'texfont'}; } return ($size, $selected_font); @@ -1050,7 +1073,7 @@ 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 +1114,11 @@ 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 +1129,15 @@ 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 +1158,12 @@ 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. @@ -1351,6 +1384,7 @@ sub start_function { my $function = &Apache::lonxml::get_all_text("/function",$parser, $style); $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]); + $function=~s/\^/\*\*/gs; $curves[-1]->{'function'} = $function; } elsif ($target eq 'edit') { $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function'); @@ -1421,7 +1455,7 @@ sub start_data { } # complain if the number of data points is not the same as # in previous sets of data. - if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){ + if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){ &Apache::lonxml::warning ('Number of data points is not consistent with previous '. 'number of data points'); @@ -1647,8 +1681,12 @@ sub write_gnuplot_file { $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n"; # title, xlabel, ylabel # titles - my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' 0, -0.5 ' : ''; - my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' -0.5, 0 ' : ''; + my $offset; + if ($version >= 4.4) { + $offset = 'offset '; + } + my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' '.$offset.'0, -0.5 ' : ''; + my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' '.$offset.'-0.5, 0 ' : ''; if ($target eq 'tex') { $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ; @@ -1665,20 +1703,36 @@ sub write_gnuplot_file { $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror "); $gnuplot_input .= "$xtics{'start'}, "; $gnuplot_input .= "$xtics{'increment'}, "; - $gnuplot_input .= "$xtics{'end'}\n"; + $gnuplot_input .= "$xtics{'end'} "; + if ($target eq 'tex') { + $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso 8859-1 enc. + } + $gnuplot_input .= "\n"; if ($xtics{'minorfreq'} != 0) { $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n"; } + } else { + if ($target eq 'tex') { + $gnuplot_input .= 'set xtics font "Helvetica,22"'."\n"; # needed in iso 8859-1 enc + } } if (%ytics) { $gnuplot_input .= "set ytics $ytics{'location'} "; $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror "); $gnuplot_input .= "$ytics{'start'}, "; $gnuplot_input .= "$ytics{'increment'}, "; - $gnuplot_input .= "$ytics{'end'}\n"; + $gnuplot_input .= "$ytics{'end'} "; + if ($target eq 'tex') { + $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso-8859-1 encoding. + } + $gnuplot_input .= "\n"; if ($ytics{'minorfreq'} != 0) { $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n"; } + } else { + if ($target eq 'tex') { + $gnuplot_input .= 'set ytics font "Helvetica,22"'."\n"; # Needed for iso 8859-1 enc. + } } # axis if (%axis) { @@ -1700,6 +1754,26 @@ sub write_gnuplot_file { } $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n"; $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n"; + if ($axis{'xzero'} ne 'off') { + $gnuplot_input .= "set xzeroaxis "; + if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') { + $gnuplot_input .= "lt -1 "; + if ($axis{'xzero'} eq 'thick-line') { + $gnuplot_input .= "lw 3 "; + } + } + $gnuplot_input .= "\n"; + } + if ($axis{'yzero'} ne 'off') { + $gnuplot_input .= "set yzeroaxis "; + if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') { + $gnuplot_input .= "lt -1 "; + if ($axis{'yzero'} eq 'thick-line') { + $gnuplot_input .= "lw 3 "; + } + } + $gnuplot_input .= "\n"; + } } # Key if (%key) { @@ -1988,3 +2062,118 @@ sub insert_data { __END__ +=head1 NAME + +Apache::lonplot.pm + +=head1 SYNOPSIS + +XML-based plotter of graphs + +This is part of the LearningOnline Network with CAPA project +described at http://www.lon-capa.org. + + +=head1 SUBROUTINES (parsing and edit rendering) + +=over + +=item start_gnuplot() + +=item end_gnuplot() + +=item start_xtics() + +=item end_xtics() + +=item start_ytics() + +=item end_ytics() + +=item get_font() + +=item start_key() + +=item end_key() + +=item parse_label() + +=item replace_entities() + +=item start_title() + +=item end_title() + +=item start_xlabel() + +=item end_xlabel() + +=item start_ylabel() + +=item end_label() + +=item start_curve() + +=item end_curve() + +=item start_function() + +=item end_function() + +=item start_data() + +=item end_data() + +=item start_axis() + +=item end_axis + +=back + +=head1 SUBROUTINES (Utility) + +=over + +=item set_defaults() + +=item get_attributes() + +=item write_gnuplot_file() + +=item check_inputs() + +=item edit_attributes() + +=back + +=head1 SUBROUTINES (Insertion functions for editing plots) + +=over + +=item insert_gnuplot() + +=item insert_tics() + +=item insert_xtics() + +=item insert_key() + +=item insert_axis() + +=item insert_title() + +=item insert_xlabel() + +=item insert_ylabel() + +=item insert_label() + +=item insert_curve() + +=item insert_function() + +=item insert_data() + +=back + +=cut