Plot
require 'SVG/Graph/TimeSeries' # Data sets are x,y pairs projection = ["6/17/72", 11, "1/11/72", 7, "4/13/04 17:31", 11, "9/11/01", 9, "9/1/85", 2, "9/1/88", 1, "1/15/95", 13] actual = ["8/1/73", 18, "3/1/77", 15, "10/1/98", 4, "5/1/02", 14, "3/1/95", 6, "8/1/91", 12, "12/1/87", 6, "5/1/84", 17, "10/1/80", 12] title = "Ice Cream Cone Consumption" graph = SVG::Graph::TimeSeries.new( { :width => 640, :height => 480, :graph_title => title, :show_graph_title => true, :no_css => true, :key => true, :scale_x_integers => true, :scale_y_integers => true, :min_x_value => 0, :min_y_value => 0, :show_data_values => true, :show_x_guidelines => true, :show_x_title => true, :x_title => "Time", :show_y_title => true, :y_title => "Ice Cream Cones", :y_title_text_direction => :bt, :stagger_x_labels => true, :x_label_format => "%m/%d/%y", }) graph.add_data({ :data => projection, :title => 'Projected', }) graph.add_data({ :data => actual, :title => 'Actual', }) print graph.burn()
Produces a graph of temporal scalar data.
www.germane-software/repositories/public/SVG/test/timeseries.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:
[ "12:30", 2 ] # A data set with 1 point: ("12:30",2) [ "01:00",2, "14:20",6] # A data set with 2 points: ("01:00",2) and # ("14:20",6)
Note that multiple data sets within the same chart 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.
The dates must be parseable by ParseDate, but otherwise can be any order of magnitude (seconds within the hour, or years)
Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>
Copyright 2004 Sean E. Russell This software is available under the Ruby license
Add data to the plot.
d1 = [ "12:30", 2 ] # A data set with 1 point: ("12:30",2) d2 = [ "01:00",2, "14:20",6] # A data set with 2 points: ("01:00",2) and # ("14:20",6) graph.add_data( :data => d1, :title => 'One' ) graph.add_data( :data => d2, :title => 'Two' )
Note that the data must be in time,value pairs. The time may be any date in a format that is parseable by ParseDate, a Time object, or a number of seconds after the unix epoch.
# File lib/SVG/Graph/TimeSeries.rb, line 151 def add_data data data[:data].each_index do |i| data[:data][i] = parse_time(data[:data][i]).to_i if i % 2 == 0 end super(data) end
In addition to the defaults set by Graph::initialize and Plot::set_defaults, sets:
'%Y-%m-%d %H:%M:%S'
'%Y-%m-%d %H:%M:%S'
# File lib/SVG/Graph/TimeSeries.rb, line 108 def set_defaults super init_with( #:max_time_span => '', :x_label_format => '%Y-%m-%d %H:%M:%S', :popup_format => '%Y-%m-%d %H:%M:%S' ) end
# File lib/SVG/Graph/TimeSeries.rb, line 171 def format x, y, description info = [ Time.at(x).strftime(popup_format), round_popups ? (y * 100).to_i / 100 : y, description ].compact.join(', ') end
# File lib/SVG/Graph/TimeSeries.rb, line 179 def get_x_labels get_x_values.collect { |v| Time.at(v).strftime( x_label_format ) } end
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