require 'date'
-class GraphController < ApplicationController
-
+class GraphController < ApplicationController
class GruffGraff
def initialize(options)
- size = "700x400"
+ size = options[:size] ? options[:size] : "400x300" #allow custom sizing
@graph = options[:graph_type].new(size)
-
- @graph.theme = { :background_colors => ['#73BF26', '#ffffff'] }
+
+ @graph.no_data_message = "No Voters"
+
+ @graph.theme = { :colors => ['#005CD9', '#DC0D13', '#131313', '#990033'],
+ :background_colors => ['#74CE00', '#FFFFFF'] }
@graph.font = File.expand_path('/usr/X11R6/lib/X11/fonts/TTF/Vera.ttf',
RAILS_ROOT)
# fill in the data with the optional data name
- @graph.data( options.fetch(:data_name, nil), options[:data] )
-
+ #Check to see if multiple datasets, if so, fill them all!
+ #Sort by biggest first piece of data.
+ if options[:data].is_a?(Hash)
+ options[:data].sort {|a,b| b[1][0] <=> a[1][0]}.each do |dataset|
+ @graph.data(dataset[0], dataset[1])
+ end
+ #if each dataset nameless, will have only multiple arrays
+ elsif options[:data].size > 1 && options[:data].all? {|i| i.is_a?(Array)}
+ options[:data].each do |array|
+ @graph.data( options.fetch(:data_name, "Data"), array)
+ end
+ else #one dimensional array, just pass it in
+ @graph.data( options.fetch(:data_name, "Data"), options[:data] )
+ end
+
# set the labels or create an empty hash
@graph.labels = options[:interval_labels] \
- if options.has_key?(:labels) and options[:labels].class = Hash
+ if options.has_key?(:interval_labels) and \
+ options[:interval_labels].class == Hash
@graph.x_axis_label = options[:x_axis_label] \
if options.has_key?(:x_axis_label)
@graph.y_axis_label = options[:y_axis_label] \
:data => data,
:interval_labels => labels,
:title => "Voters Over Time",
+ :size => "700x400",
:x_axis_label => scale,
:y_axis_label => "Number of Votes")
send_data(*graph.output)
end
-
- def quickvote_bar
- @election = Election.find(params[:id])
- end
def borda_bar
@election = Election.find(params[:id])
- pref_tally = make_preference_tally(@election)
-
- @borda_result = BordaVote.new(pref_tally).result
- data, labels = get_borda_points(@borda_result)
+ @election.results unless @election.borda_result
+ data, labels = get_borda_points(@election.borda_result)
graph = GruffGraff.new( :graph_type => Gruff::Bar,
:data_name => @election.name,
:x_axis_label => "Candidate")
send_data(*graph.output)
end
-
+ #Acording to Tufte, small, concomparitive, highly labeled data sets usually
+ #belong in tables. The following is a bar graph...but would it be better
+ #as a table?
+ def choices_positions
+ @election = Election.find(params[:id])
+ legend = Hash.new
+ alldata, labels = get_positions_info(@election)
+ @election.results unless @election.condorcet_result || @election.ssd_result
+ ranked_candidates = @election.condorcet_result.ranked_candidates.flatten
+
+ names = Hash.new
+ candidates = @election.candidates.sort.collect {|candidate| candidate.id}
+ candidates.each do |candidate|
+ names[candidate]= (Candidate.find(candidate)).name
+ end
+
+ ranked_candidates.each_with_index \
+ {|candidate, index| legend[names[candidate]] = alldata[index]}
+
+ graph = GruffGraff.new( :graph_type => Gruff::Bar,
+ :data => legend,
+ :interval_labels => labels,
+ :title => "Times Voted in Each Position",
+ :y_axis_label => "Number of Times Ranked",
+ :x_axis_label => "Rank")
+ send_data(*graph.output)
+ end
+
+ def plurality_pie
+ @election = Election.find(params[:id])
+ @election.results unless @election.plurality_result || @election.approval_result
+ votes = @election.votes.size
+ data = Hash.new
+ names = @election.names_by_id
+
+ @election.plurality_result.points.each do |candidate, votes|
+ data[names[candidate]] = votes
+ end
+
+ pie = GruffGraff.new( :graph_type => Gruff::Pie,
+ :title => "Percentage of First Place Votes",
+ :data => data)
+ send_data(*pie.output)
+
+ end
+
private
+ def get_positions_info(election)
+ buckets = Hash.new
+ buckets2= Hash.new
+ rank_labels = Hash.new
+
+ #attach the ranking to the candidate's array to which is belongs
+ #creating a key if necessary
+ election.votes.each do |vote|
+ vote.rankings.each do |ranking|
+
+ unless buckets.has_key?(ranking.candidate_id)
+ buckets[ranking.candidate_id] = []
+ end
+ buckets[ranking.candidate_id] << ranking.rank
+
+ end
+ end
+
+ #count how many times each candidate has been ranked at a certain level
+ buckets.each_pair do |id, array|
+ (1..election.candidates.size).each do |i|
+ buckets2[id] = [] unless buckets2.has_key?(id)
+ buckets2[id] << (array.find_all {|rank| rank == i}).size
+ end
+ end
+
+ #sort by amount of 1st place votes
+ sorted_data = buckets2.values.sort {|a,b| b[0] <=> a[0]}
+
+ election.votes.each do |vote|
+ vote.rankings.size.times do |i|
+ rank_labels[i] = (i+1).to_s
+ end
+ end
+
+ return sorted_data, rank_labels
+ end
# generate the data and labels for each graph
def get_votes_per_day_data(election)
# Now I need to create an array with all the times votes were made
election.votes.each do |vote|
- voter_days << Date.parse(vote.time.to_s)
+ next unless vote.time
+ voter_days << Date.parse(vote.time.to_s)
end
voter_days.sort!
# Make a hash, buckets, indexed by time intervals and containing empty arrays
# The time object must come first in addition!
- # i would start at 0, i+1 goes from 0 up till numcols
+ # i would start at 0, i+1 goes from 1 up till numcols
numcols.times {|i| buckets[starttime + ((i+1)*interval_length)] = []}
# Put votes into bucket according to the time interval to which they belong,
# referenced by their key
- # Will build a graph over time, as each successive interval wil lhave more
+ # Will build a graph over time, as each successive interval will have more
# vote objects
election.votes.each do |vote|
+ next unless vote.time
buckets.keys.sort.each do |inter|
if vote.time < inter
buckets[inter] << vote
interval_type = "Hour of the Day on 24 hour scale"
else #more than 2 days means use dates for labels
labels_hash[0] = (Date.parse(starttime.to_s)).to_s
- labels_hash[(numcols/2)-1] = (Date.parse(starttime + (timedelta/2))).to_s
+ labels_hash[(numcols/2)-1] = (Date.parse((starttime + (timedelta/2)).to_s)).to_s
labels_hash[numcols-1] = (Date.today).to_s
interval_type = "The Date"
end
end
def get_borda_points(result)
- #points holds how mnay points each candidate has received in array form
- #becasue Gruff::Bar#data takes only an array
points = Array.new
labels = Hash.new
#Populate points with an sorted array from election.votes hash
#biggest to smallest will go from left to right
- points = result.election.votes.sort do |a, b|
+ points = result.points.sort do |a, b|
b[1] <=> a[1]
end.collect {|i| i[1]}
projects / selectricity / blobdiff