NAME

LaTeX::PGF::Diagram2D:: - Perl extension for drawing 2D diagrams (label).

SYNOPSIS

  use LaTeX::PGF::Diagram2D;
  
  my $Uq = 1.0;
  my $Ri = 4.0;
  
  sub I($)
  {
    my $RL = shift;
    my $back = $Uq / ($Ri + $RL);
    return $back;
  }
  
  # 10 centimeters wide, 6 centimeters high 
  my $d = LaTeX::PGF::Diagram2D->new(10.0, 6.0);
  
  $d->set_font_size(12.0);
  
  # R (on the x axis) is in the range 0 ... 10
  $d->axis('b')->set_linear(0.0, 10.0)->set_grid_step(1.0)
	       ->set_tic_step(1.0);
  # I (on the y axis) is in the range 0 ... 0,3
  $d->axis('l')->set_linear(0.0,  0.3)->set_grid_step(0.05)
	       ->set_tic_step(0.1);
  
  my $p = $d->plot('b', 'l');
  $p->set_xy_fct(\&I);

  my $l = $d->label('b', 'l', 3.5, 0.175,
  "\\colorbox{white}{\\ovalbox{\\(R_{\\text{i}}=4\\,\\Omega\\)}}"
  );
  $l->set_color("black!50!blue");
  
  $d->write("test001a.pgf");

DESCRIPTION

Each object of the LaTeX::PGF::Diagram2D::Label class represents one additional text label drawn in the plot. The LaTeX::PGF::Diagram2D object's label() method creates a new LaTeX::PGF::Diagram2D::Label object and returns a reference to it. This reference can be used for further setup (setting the color).

The set_color() method can be used to set the label color, use a LaTeX color description as argument.

EXPORT

None by default.

SEE ALSO

AUTHOR

Dirk Krause, <krause@localdomain>

COPYRIGHT AND LICENSE

Copyright (C) 2011 by Dirk Krause

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.12.3 or, at your option, any later version of Perl 5 you may have available.