require 'SVG/Graph/Plot' module SVG module Graph # === For creating SVG plots of scalar temporal data # # = Synopsis # # require 'SVG/Graph/TimeSeriess' # # # Data sets are x,y pairs # data1 = ["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] # data2 = ["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] # # 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_labels => 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() # # = Description # # Produces a graph of temporal scalar data. # # = Examples # # http://www.germane-software/repositories/public/SVG/test/timeseries.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: # # [ "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) # # = See also # # * SVG::Graph::Graph # * SVG::Graph::BarHorizontal # * SVG::Graph::Bar # * SVG::Graph::Line # * SVG::Graph::Pie # * SVG::Graph::Plot # # == Author # # Sean E. Russell # # Copyright 2004 Sean E. Russell # This software is available under the Ruby license[LICENSE.txt] # class TimeSeries < Plot # In addition to the defaults set by Graph::initialize and # Plot::set_defaults, sets: # [x_label_format] '%Y-%m-%d %H:%M:%S' # [popup_format] '%Y-%m-%d %H:%M:%S' 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 # The format string use do format the X axis labels. # See Time::strformat attr_accessor :x_label_format # Use this to set the spacing between dates on the axis. The value # must be of the form # "\d+ ?(days|weeks|months|years|hours|minutes|seconds)?" # # EG: # # graph.timescale_divisions = "2 weeks" # # will cause the chart to try to divide the X axis up into segments of # two week periods. attr_accessor :timescale_divisions # The formatting used for the popups. See x_label_format attr_accessor :popup_format # 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, and that the date format # may be any date that is parseable by ParseDate. def add_data data @data = [] unless @data raise "No data provided by #{@data.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| if i%2 == 0 t = DateTime.parse( data[:data][i] ).to_time x << t.to_i else y << data[:data][i] end } sort( x, y ) data[:data] = [x,y] @data << data end protected def min_x_value=(value) @min_x_value = DateTime.parse( data[:data][i] ).to_time end def format x, y Time.at( x ).strftime( popup_format ) end def get_x_labels get_x_values.collect { |v| Time.at(v).strftime( x_label_format ) } end private def get_x_values rv = [] min, max, scale_division = x_range if timescale_divisions timescale_divisions =~ /(\d+) ?(day|week|month|year|hour|minute|second)?/ division_units = $2 ? $2 : "day" amount = $1.to_i if amount step = nil case division_units when "month" cur = min while cur < max rv << cur arr = Time.at( cur ).to_a arr[4] += amount if arr[4] > 12 arr[5] += (arr[4] / 12).to_i arr[4] = (arr[4] % 12) end cur = Time.local(*arr).to_i end when "year" cur = min while cur < max rv << cur arr = Time.at( cur ).to_a arr[5] += amount cur = Time.local(*arr).to_i end when "week" step = 7 * 24 * 60 * 60 * amount when "day" step = 24 * 60 * 60 * amount when "hour" step = 60 * 60 * amount when "minute" step = 60 * amount when "second" step = amount end min.step( max, step ) {|v| rv << v} if step return rv end end min.step( max, scale_division ) {|v| rv << v} return rv end end end end