| Class | SVG::Graph::Plot |
| In: |
temp/Graph/Plot.rb
|
| Parent: | Graph |
require 'SVG/Graph/Plot'
# Data sets are x,y pairs
# Note that multiple data sets can differ in length, and that the
# data in the datasets needn't be in order; they will be ordered
# by the plot along the X-axis.
projection = [
6, 11, 0, 5, 18, 7, 1, 11, 13, 9, 1, 2, 19, 0, 3, 13,
7, 9
]
actual = [
0, 18, 8, 15, 9, 4, 18, 14, 10, 2, 11, 6, 14, 12,
15, 6, 4, 17, 2, 12
]
graph = SVG::Graph::Plot.new({
:height => 500,
:width => 300,
:key => true,
:scale_x_integers => true,
:scale_y_integerrs => true,
})
graph.add_data({
:data => projection
:title => 'Projected',
})
graph.add_data({
:data => actual,
:title => 'Actual',
})
print graph.burn()
Produces a graph of scalar data.
This object aims to allow you to easily create high quality SVG scalar plots. You can either use the default style sheet or supply your own. Either way there are many options which can be configured to give you control over how the graph is generated - with or without a key, data elements at each point, title, subtitle etc.
www.germane-software/repositories/public/SVG/test/plot.rb
The default stylesheet handles upto 10 data sets, if you use more you must create your own stylesheet and add the additional settings for the extra data sets. You will know if you go over 10 data sets as they will have no style and be in black.
Unlike the other types of charts, data sets must contain x,y pairs:
[ 1, 2 ] # A data set with 1 point: (1,2) [ 1,2, 5,6] # A data set with 2 points: (1,2) and (5,6)
Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>
Copyright 2004 Sean E. Russell This software is available under the Ruby license
| X | = | 0 |
| Y | = | 1 |
| area_fill | [RW] | Fill the area under the line |
| min_x_value | [RW] | Set the minimum value of the X axis |
| min_y_value | [RW] | Set the minimum value of the Y axis |
| scale_x_divisions | [RW] |
Determines the scaling for the X axis divisions.
graph.scale_x_divisions = 2 would cause the graph to attempt to generate labels stepped by 2; EG: 0,2,4,6,8… |
| scale_x_integers | [RW] | Make the X axis labels integers |
| scale_y_divisions | [RW] |
Determines the scaling for the Y axis divisions.
graph.scale_y_divisions = 0.5 would cause the graph to attempt to generate labels stepped by 0.5; EG: 0, 0.5, 1, 1.5, 2, … |
| scale_y_integers | [RW] | Make the Y axis labels integers |
| show_data_points | [RW] | Show a small circle on the graph where the line goes from one point to the next. |
Adds data to the plot. The data must be in X,Y pairs; EG
[ 1, 2 ] # A data set with 1 point: (1,2) [ 1,2, 5,6] # A data set with 2 points: (1,2) and (5,6)
In addition to the defaults set by Graph::initialize, sets