require 'SVG/Graph/Schedule' # Data sets are label, start, end tripples. data1 = [ "Housesitting", "6/17/04", "6/19/04", "Summer Session", "6/15/04", "8/15/04", ] graph = SVG::Graph::Schedule.new( { :width => 640, :height => 480, :graph_title => title, :show_graph_title => true, :no_css => true, :scale_x_integers => true, :scale_y_integers => true, :min_x_value => 0, :min_y_value => 0, :show_data_labels => true, :show_x_guidelines => true, :show_x_title => true, :x_title => "Time", :stagger_x_labels => true, :stagger_y_labels => true, :x_label_format => "%m/%d/%y", }) graph.add_data({ :data => data1, :title => 'Data', }) print graph.burn()
Produces a graph of temporal scalar data.
www.germane-software/repositories/public/SVG/test/schedule.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.
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.
# A data set with 1 point: Lunch from 12:30 to 14:00 d1 = [ "Lunch", "12:30", "14:00" ] # A data set with 2 points: "Cats" runs from 5/11/03 to 7/15/04, and # "Henry V" runs from 6/12/03 to 8/20/03 d2 = [ "Cats", "5/11/03", "7/15/04", "Henry V", "6/12/03", "8/20/03" ] graph.add_data( :data => d1, :title => 'Meetings' ) graph.add_data( :data => d2, :title => 'Plays' )
Note that the data must be in time,value pairs, and that the date format may be any date that is parseable by ParseDate. Also note that, in this example, we're mixing scales; the data from d1 will probably not be discernable if both data sets are plotted on the same graph, since d1 is too granular.
# File lib/SVG/Graph/Schedule.rb, line 146 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 title,from,to tripples! "+ "The data provided contained an odd set of "+ "data points" unless data[:data].length % 3 == 0 return if data[:data].length == 0 y = [] x_start = [] x_end = [] data[:data].each_index {|i| im3 = i%3 if im3 == 0 y << data[:data][i] else if TIME_PARSE_AVAIL then arr = DateTime.parse(data[:data][i]) t = arr.to_time else arr = ParseDate.parsedate( data[:data][i] ) t = Time.local( *arr[0,6].compact ) end (im3 == 1 ? x_start : x_end) << t.to_i end } sort( x_start, x_end, y ) @data = [x_start, x_end, y ] 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/Schedule.rb, line 92 def set_defaults init_with( :x_label_format => '%Y-%m-%d %H:%M:%S', :popup_format => '%Y-%m-%d %H:%M:%S', :scale_x_divisions => false, :scale_x_integers => false, :bar_gap => true ) end
# File lib/SVG/Graph/Schedule.rb, line 210 def draw_data fieldheight = field_height fieldwidth = field_width bargap = bar_gap ? (fieldheight < 10 ? fieldheight / 2 : 10) : 0 subbar_height = fieldheight - bargap field_count = 1 y_mod = (subbar_height / 2) + (font_size / 2) min,max,div = x_range scale = (@graph_width.to_f - font_size*2) / (max-min) @data[0].each_index { |i| x_start = @data[0][i] x_end = @data[1][i] y = @graph_height - (fieldheight * field_count) bar_width = (x_end-x_start) * scale bar_start = x_start * scale - (min * scale) @graph.add_element( "rect", { "x" => bar_start.to_s, "y" => y.to_s, "width" => bar_width.to_s, "height" => subbar_height.to_s, "class" => "fill#{field_count+1}" }) field_count += 1 } end
# File lib/SVG/Graph/Schedule.rb, line 194 def format x, y Time.at( x ).strftime( popup_format ) end
# File lib/SVG/Graph/Schedule.rb, line 239 def get_css return /* default fill styles for multiple datasets (probably only use a single dataset on this graph though) */.key1,.fill1{ fill: #ff0000; fill-opacity: 0.5; stroke: none; stroke-width: 0.5px; }.key2,.fill2{ fill: #0000ff; fill-opacity: 0.5; stroke: none; stroke-width: 1px; }.key3,.fill3{ fill: #00ff00; fill-opacity: 0.5; stroke: none; stroke-width: 1px; }.key4,.fill4{ fill: #ffcc00; fill-opacity: 0.5; stroke: none; stroke-width: 1px; }.key5,.fill5{ fill: #00ccff; fill-opacity: 0.5; stroke: none; stroke-width: 1px; }.key6,.fill6{ fill: #ff00ff; fill-opacity: 0.5; stroke: none; stroke-width: 1px; }.key7,.fill7{ fill: #00ffff; fill-opacity: 0.5; stroke: none; stroke-width: 1px; }.key8,.fill8{ fill: #ffff00; fill-opacity: 0.5; stroke: none; stroke-width: 1px; }.key9,.fill9{ fill: #cc6666; fill-opacity: 0.5; stroke: none; stroke-width: 1px; }.key10,.fill10{ fill: #663399; fill-opacity: 0.5; stroke: none; stroke-width: 1px; }.key11,.fill11{ fill: #339900; fill-opacity: 0.5; stroke: none; stroke-width: 1px; }.key12,.fill12{ fill: #9966FF; fill-opacity: 0.5; stroke: none; stroke-width: 1px; } end
# File lib/SVG/Graph/Schedule.rb, line 198 def get_x_labels rv = get_x_values.collect { |v| Time.at(v).strftime( x_label_format ) } end
# File lib/SVG/Graph/Schedule.rb, line 206 def get_y_labels @data[2] end
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