SVG::Graph (3pm)

  use SVG::Graph;
  use SVG::Graph::Data;
  use SVG::Graph::Data::Datum;

  #create a new SVG document to plot in...
  my $graph = SVG::Graph->new(width=>600,height=>600,margin=>30);

  #and create a frame to hold the data/glyphs
  my $frame = $graph->add_frame;

  #let's plot y = x^2
  my @data = map {SVG::Graph::Data::Datum->new(x=>$_,y=>$_^2)}
                 (1,2,3,4,5);
  my $data = SVG::Graph::Data->new(data => \@data);

  #put the xy data into the frame
  $frame->add_data($data);

  #add some glyphs to apply to the data in the frame
  $frame->add_glyph('axis',        #add an axis glyph
    'x_absolute_ticks' => 1,       #with ticks every one
                                   #unit on the x axis
    'y_absolute_ticks' => 1,       #and ticks every one
                                   #unit on the y axis

    'stroke'           => 'black', #draw the axis black
    'stroke-width'     => 2,       #and 2px thick
  );

  $frame->add_glyph('scatter',     #add a scatterplot glyph
    'stroke' => 'red',             #the dots will be outlined
                                   #in red,
    'fill'   => 'red',             #filled red,
    'fill-opacity' => 0.5,         #and 50% opaque
  );

  #print the graphic
  print $graph->draw;

SVG::Graph is a suite of perl modules for plotting data. SVG::Graph currently supports plots of one-, two- and three-dimensional data, as well as N-ary rooted trees. Data may be represented as:

Glyph Name Dimensionality supported 1d 2d 3d tree -------------------------------------------------------- Axis x Bar Graph x Bubble Plot x Heatmap Graph x Line Graph x Pie Graph x Scatter Plot x Spline Graph x Tree x

SVG::Graph 0.02 is a pre-alpha release. Keep in mind that many of the glyphs are not very robust.

You need to create a SVG::Graph::Frame instance from the parent SVG::Graph instance for each set of data to be plotted. Datasets can be hierarchical, and to represent this, SVG::Graph::Frame instances can themselves contain subframes. SVG::Graph::Frame can contain:

- multiple subframes as instances of SVG::Graph::Frame - a single SVG::Graph::Data instance - multiple SVG::Graph::Glyph instances with which to render the attached SVG::Graph::Data instance, and all SVG::Graph::Data instances attached to SVG::Graph::Frame subinstances

See SVG::Graph::Frame and SVG::Graph::Glyph for details.

\s-1ONE\s0 \s-1DATA\s0 \s-1SET\s0

1. create an SVG::Graph instance 2. create an SVG::Graph::Frame instance by calling SVG::Graph::add_frame(); 3. create an SVG::Graph::Data instance, containing an SVG::Graph::Data::Datum instance for each data point. 4. Attach the SVG::Graph::Data instance to your SVG::Graph::Frame using SVG::Graph::Frame::add_data(); 5. Attach glyphs to the SVG::Graph::Frame instance using SVG::Graph::Frame::add_glyph(); 6. Call SVG::Graph::draw();

\s-1MULTIPLE\s0 \s-1DATA\s0 \s-1SETS\s0

1. create an SVG::Graph instance 2. create an SVG::Graph::Frame instance by calling SVG::Graph::add_frame(); 3. create an SVG::Graph::Data instance, containing an SVG::Graph::Data::Datum instance for each data point. 4. Attach the SVG::Graph::Data instance to your SVG::Graph::Frame using SVG::Graph::Frame::add_data(); 5. Attach glyphs to the SVG::Graph::Frame instance using SVG::Graph::Frame::add_glyph(); 6. repeat [2-5] for each additional data set to be added. add_frame() can be called on SVG::Graph to add top-level data sets, or SVG::Graph::Frame to add hierarchical data sets. 7. Call SVG::Graph::draw();

Send an email to the svg-graph-developers list. For more info, visit the project page at http://www.sf.net/projects/svg-graph

Allen Day, <[email protected]> Chris To, <[email protected]>

James Chen, <[email protected]> Brian O'Connor, <[email protected]>

\s-1SVG\s0

new

Title : new Usage : my $graph = SVG::Graph->new(width=>600, height=>600, margin=>20); Function: creates a new SVG::Graph object Returns : a SVG::Graph object Args : width => the width of the SVG height => the height of the SVG margin => margin for the root frame

init

Title : init Usage : Function: Example : Returns : Args :

width

Title : width Usage : $obj->width($newval) Function: Example : Returns : value of width (a scalar) Args : on set, new value (a scalar or undef, optional)

height

Title : height Usage : $obj->height($newval) Function: Example : Returns : value of height (a scalar) Args : on set, new value (a scalar or undef, optional)

margin

Title : margin Usage : $obj->margin($newval) Function: Example : Returns : value of margin (a scalar) Args : on set, new value (a scalar or undef, optional)

svg

Title : svg Usage : $obj->svg($newval) Function: Example : Returns : value of svg (a scalar) Args : on set, new value (a scalar or undef, optional)

add_frame

Title : add_frame Usage : my $frame = $graph->add_frame Function: adds a Frame to the current Graph Returns : a SVG::Graph::Frame object Args : a hash. usable keys: frame_transform (optional) 'top' default orientation 'bottom' rotates graph 180 deg (about the center) 'right' points top position towards right 'left' points top position towards left

frames

Title : frames Usage : get/set Function: Example : Returns : Args :

xoffset

Title : xoffset Usage : $obj->xoffset($newval) Function: Example : Returns : value of xoffset (a scalar) Args : on set, new value (a scalar or undef, optional)

yoffset

Title : yoffset Usage : $obj->yoffset($newval) Function: Example : Returns : value of yoffset (a scalar) Args : on set, new value (a scalar or undef, optional)

draw

Title : draw Usage : $graph=>draw Function: depends on child glyph implementations Returns : xmlifyied SVG object Args : none