Graph(3) User Contributed Perl Documentation Graph(3)NAMESVG::Graph - Visualize your data in Scalable Vector Graphics (SVG)
format.
SYNOPSIS
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;
DESCRIPTIONSVG::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.
PLOTTING
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.
ONE DATA SET
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();
MULTIPLE DATA SETS
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();
FEEDBACK
Send an email to the svg-graph-developers list. For more info, visit
the project page at http://www.sf.net/projects/svg-graph
AUTHORS
Allen Day, <allenday@ucla.edu>
Chris To, <crsto@ucla.edu>
CONTRIBUTORS
James Chen, <chenj@seas.ucla.edu>
Brian O'Connor, <boconnor@ucla.edu>
SEE ALSO
SVG
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
perl v5.14.1 2008-06-11 Graph(3)
