You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
501 lines
12 KiB
501 lines
12 KiB
require 'SVG/Graph/Graph'
|
|
|
|
module SVG
|
|
module Graph
|
|
# === For creating SVG plots of scalar data
|
|
#
|
|
# = Synopsis
|
|
#
|
|
# 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()
|
|
#
|
|
# = Description
|
|
#
|
|
# Produces a graph of scalar data.
|
|
#
|
|
# This object aims to allow you to easily create high quality
|
|
# SVG[http://www.w3c.org/tr/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.
|
|
#
|
|
# = Examples
|
|
#
|
|
# http://www.germane-software/repositories/public/SVG/test/plot.rb
|
|
#
|
|
# = Notes
|
|
#
|
|
# 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)
|
|
#
|
|
# = See also
|
|
#
|
|
# * SVG::Graph::Graph
|
|
# * SVG::Graph::BarHorizontal
|
|
# * SVG::Graph::Bar
|
|
# * SVG::Graph::Line
|
|
# * SVG::Graph::Pie
|
|
# * SVG::Graph::TimeSeries
|
|
#
|
|
# == Author
|
|
#
|
|
# Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>
|
|
#
|
|
# Copyright 2004 Sean E. Russell
|
|
# This software is available under the Ruby license[LICENSE.txt]
|
|
#
|
|
class Plot < Graph
|
|
|
|
# In addition to the defaults set by Graph::initialize, sets
|
|
# [show_data_values] true
|
|
# [show_data_points] true
|
|
# [area_fill] false
|
|
# [stacked] false
|
|
def set_defaults
|
|
init_with(
|
|
:show_data_values => true,
|
|
:show_data_points => true,
|
|
:area_fill => false,
|
|
:stacked => false
|
|
)
|
|
self.top_align = self.right_align = self.top_font = self.right_font = 1
|
|
end
|
|
|
|
# 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...
|
|
attr_accessor :scale_x_divisions
|
|
# 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, ...
|
|
attr_accessor :scale_y_divisions
|
|
# Make the X axis labels integers
|
|
attr_accessor :scale_x_integers
|
|
# Make the Y axis labels integers
|
|
attr_accessor :scale_y_integers
|
|
# Fill the area under the line
|
|
attr_accessor :area_fill
|
|
# Show a small circle on the graph where the line
|
|
# goes from one point to the next.
|
|
attr_accessor :show_data_points
|
|
# Set the minimum value of the X axis
|
|
attr_accessor :min_x_value
|
|
# Set the minimum value of the Y axis
|
|
attr_accessor :min_y_value
|
|
|
|
|
|
# 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)
|
|
def add_data data
|
|
@data = [] unless @data
|
|
|
|
raise "No data provided by #{conf.inspect}" unless data[:data] and
|
|
data[:data].kind_of? Array
|
|
raise "Data supplied must be x,y pairs! "+
|
|
"The data provided contained an odd set of "+
|
|
"data points" unless data[:data].length % 2 == 0
|
|
return if data[:data].length == 0
|
|
|
|
x = []
|
|
y = []
|
|
data[:data].each_index {|i|
|
|
(i%2 == 0 ? x : y) << data[:data][i]
|
|
}
|
|
sort( x, y )
|
|
data[:data] = [x,y]
|
|
@data << data
|
|
end
|
|
|
|
|
|
protected
|
|
|
|
def keys
|
|
@data.collect{ |x| x[:title] }
|
|
end
|
|
|
|
def calculate_left_margin
|
|
super
|
|
label_left = get_x_labels[0].to_s.length / 2 * font_size * 0.6
|
|
@border_left = label_left if label_left > @border_left
|
|
end
|
|
|
|
def calculate_right_margin
|
|
super
|
|
label_right = get_x_labels[-1].to_s.length / 2 * font_size * 0.6
|
|
@border_right = label_right if label_right > @border_right
|
|
end
|
|
|
|
|
|
X = 0
|
|
Y = 1
|
|
def x_range
|
|
max_value = @data.collect{|x| x[:data][X][-1] }.max
|
|
min_value = @data.collect{|x| x[:data][X][0] }.min
|
|
min_value = min_value<min_x_value ? min_value : min_x_value if min_x_value
|
|
|
|
range = max_value - min_value
|
|
right_pad = range == 0 ? 10 : range / 20.0
|
|
scale_range = (max_value + right_pad) - min_value
|
|
|
|
scale_division = scale_x_divisions || (scale_range / 10.0)
|
|
|
|
if scale_x_integers
|
|
scale_division = scale_division < 1 ? 1 : scale_division.round
|
|
end
|
|
|
|
[min_value, max_value, scale_division]
|
|
end
|
|
|
|
def get_x_values
|
|
min_value, max_value, scale_division = x_range
|
|
rv = []
|
|
min_value.step( max_value, scale_division ) {|v| rv << v}
|
|
return rv
|
|
end
|
|
alias :get_x_labels :get_x_values
|
|
|
|
def field_width
|
|
values = get_x_values
|
|
max = @data.collect{|x| x[:data][X][-1]}.max
|
|
dx = (max - values[-1]).to_f / (values[-1] - values[-2])
|
|
(@graph_width.to_f - font_size*2*right_font) /
|
|
(values.length + dx - right_align)
|
|
end
|
|
|
|
|
|
def y_range
|
|
max_value = @data.collect{|x| x[:data][Y].max }.max
|
|
min_value = @data.collect{|x| x[:data][Y].min }.min
|
|
min_value = min_value<min_y_value ? min_value : min_y_value if min_y_value
|
|
|
|
range = max_value - min_value
|
|
top_pad = range == 0 ? 10 : range / 20.0
|
|
scale_range = (max_value + top_pad) - min_value
|
|
|
|
scale_division = scale_y_divisions || (scale_range / 10.0)
|
|
|
|
if scale_y_integers
|
|
scale_division = scale_division < 1 ? 1 : scale_division.round
|
|
end
|
|
|
|
return [min_value, max_value, scale_division]
|
|
end
|
|
|
|
def get_y_values
|
|
min_value, max_value, scale_division = y_range
|
|
rv = []
|
|
min_value.step( max_value, scale_division ) {|v| rv << v}
|
|
return rv
|
|
end
|
|
alias :get_y_labels :get_y_values
|
|
|
|
def field_height
|
|
values = get_y_values
|
|
max = @data.collect{|x| x[:data][Y].max }.max
|
|
if values.length == 1
|
|
dx = values[-1]
|
|
else
|
|
dx = (max - values[-1]).to_f / (values[-1] - values[-2])
|
|
end
|
|
(@graph_height.to_f - font_size*2*top_font) /
|
|
(values.length + dx - top_align)
|
|
end
|
|
|
|
def draw_data
|
|
line = 1
|
|
|
|
x_min, x_max, x_div = x_range
|
|
y_min, y_max, y_div = y_range
|
|
x_step = (@graph_width.to_f - font_size*2) / (x_max-x_min)
|
|
y_step = (@graph_height.to_f - font_size*2) / (y_max-y_min)
|
|
|
|
for data in @data
|
|
x_points = data[:data][X]
|
|
y_points = data[:data][Y]
|
|
|
|
lpath = "L"
|
|
x_start = 0
|
|
y_start = 0
|
|
x_points.each_index { |idx|
|
|
x = (x_points[idx] - x_min) * x_step
|
|
y = @graph_height - (y_points[idx] - y_min) * y_step
|
|
x_start, y_start = x,y if idx == 0
|
|
lpath << "#{x} #{y} "
|
|
}
|
|
|
|
if area_fill
|
|
@graph.add_element( "path", {
|
|
"d" => "M#{x_start} #@graph_height #{lpath} V#@graph_height Z",
|
|
"class" => "fill#{line}"
|
|
})
|
|
end
|
|
|
|
@graph.add_element( "path", {
|
|
"d" => "M#{x_start} #{y_start} #{lpath}",
|
|
"class" => "line#{line}"
|
|
})
|
|
|
|
if show_data_points || show_data_values
|
|
x_points.each_index { |idx|
|
|
x = (x_points[idx] - x_min) * x_step
|
|
y = @graph_height - (y_points[idx] - y_min) * y_step
|
|
if show_data_points
|
|
@graph.add_element( "circle", {
|
|
"cx" => x.to_s,
|
|
"cy" => y.to_s,
|
|
"r" => "2.5",
|
|
"class" => "dataPoint#{line}"
|
|
})
|
|
add_popup(x, y, format( x_points[idx], y_points[idx] )) if add_popups
|
|
end
|
|
make_datapoint_text( x, y-6, y_points[idx] ) if show_data_values
|
|
}
|
|
end
|
|
line += 1
|
|
end
|
|
end
|
|
|
|
def format x, y
|
|
"(#{(x * 100).to_i / 100}, #{(y * 100).to_i / 100})"
|
|
end
|
|
|
|
def get_css
|
|
return <<EOL
|
|
/* default line styles */
|
|
.line1{
|
|
fill: none;
|
|
stroke: #ff0000;
|
|
stroke-width: 1px;
|
|
}
|
|
.line2{
|
|
fill: none;
|
|
stroke: #0000ff;
|
|
stroke-width: 1px;
|
|
}
|
|
.line3{
|
|
fill: none;
|
|
stroke: #00ff00;
|
|
stroke-width: 1px;
|
|
}
|
|
.line4{
|
|
fill: none;
|
|
stroke: #ffcc00;
|
|
stroke-width: 1px;
|
|
}
|
|
.line5{
|
|
fill: none;
|
|
stroke: #00ccff;
|
|
stroke-width: 1px;
|
|
}
|
|
.line6{
|
|
fill: none;
|
|
stroke: #ff00ff;
|
|
stroke-width: 1px;
|
|
}
|
|
.line7{
|
|
fill: none;
|
|
stroke: #00ffff;
|
|
stroke-width: 1px;
|
|
}
|
|
.line8{
|
|
fill: none;
|
|
stroke: #ffff00;
|
|
stroke-width: 1px;
|
|
}
|
|
.line9{
|
|
fill: none;
|
|
stroke: #ccc6666;
|
|
stroke-width: 1px;
|
|
}
|
|
.line10{
|
|
fill: none;
|
|
stroke: #663399;
|
|
stroke-width: 1px;
|
|
}
|
|
.line11{
|
|
fill: none;
|
|
stroke: #339900;
|
|
stroke-width: 1px;
|
|
}
|
|
.line12{
|
|
fill: none;
|
|
stroke: #9966FF;
|
|
stroke-width: 1px;
|
|
}
|
|
/* default fill styles */
|
|
.fill1{
|
|
fill: #cc0000;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill2{
|
|
fill: #0000cc;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill3{
|
|
fill: #00cc00;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill4{
|
|
fill: #ffcc00;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill5{
|
|
fill: #00ccff;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill6{
|
|
fill: #ff00ff;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill7{
|
|
fill: #00ffff;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill8{
|
|
fill: #ffff00;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill9{
|
|
fill: #cc6666;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill10{
|
|
fill: #663399;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill11{
|
|
fill: #339900;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
.fill12{
|
|
fill: #9966FF;
|
|
fill-opacity: 0.2;
|
|
stroke: none;
|
|
}
|
|
/* default line styles */
|
|
.key1,.dataPoint1{
|
|
fill: #ff0000;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key2,.dataPoint2{
|
|
fill: #0000ff;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key3,.dataPoint3{
|
|
fill: #00ff00;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key4,.dataPoint4{
|
|
fill: #ffcc00;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key5,.dataPoint5{
|
|
fill: #00ccff;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key6,.dataPoint6{
|
|
fill: #ff00ff;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key7,.dataPoint7{
|
|
fill: #00ffff;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key8,.dataPoint8{
|
|
fill: #ffff00;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key9,.dataPoint9{
|
|
fill: #cc6666;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key10,.dataPoint10{
|
|
fill: #663399;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key11,.dataPoint11{
|
|
fill: #339900;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
.key12,.dataPoint12{
|
|
fill: #9966FF;
|
|
stroke: none;
|
|
stroke-width: 1px;
|
|
}
|
|
EOL
|
|
end
|
|
|
|
end
|
|
end
|
|
end
|