Class: CrashingTheDance::RpiCalculator::RPI

Inherits:
Object
  • Object
show all
Defined in:
lib/crashing_the_dance/rpi_calculator/rpi.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(team, games) ⇒ RPI

Returns a new instance of RPI.



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 6

def initialize(team, games)
  @team = team
  @games = games
  @owp = 0.0
  @oowp = 0.0
  @rpi = nil
  calculate_record
end

Instance Attribute Details

#games ⇒ Object (readonly)

Returns the value of attribute games.



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 4

def games
  @games
end

#losses ⇒ Object (readonly)

Returns the value of attribute losses.



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 4

def losses
  @losses
end

#rpi_losses ⇒ Object (readonly)

Returns the value of attribute rpi_losses.



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 4

def rpi_losses
  @rpi_losses
end

#rpi_wins ⇒ Object (readonly)

Returns the value of attribute rpi_wins.



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 4

def rpi_wins
  @rpi_wins
end

#team ⇒ Object (readonly)

Returns the value of attribute team.



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 4

def team
  @team
end

#wins ⇒ Object (readonly)

Returns the value of attribute wins.



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 4

def wins
  @wins
end

Instance Method Details

#calculate_oowp(all_teams) ⇒ Object

Now to calculate the opponents’ opponents winning percentage (OOWP), you simply average the OWPs for each of their opponents.



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 59

def calculate_oowp(all_teams)
  if games.count > 0
    sum_oowp = games.inject(0.0) do |sum, game|
      opponent = all_teams.find { |t| game.opponent.eql? t.team }
      sum + opponent.owp
    end
    @oowp = sum_oowp / games.count.to_f
  end
end

#calculate_owp(games_by_team) ⇒ Object

To calculate opponent’s winning percentage (OWP), you remove games against the team in question. However, for the purpose of calculating OWP and OOWP, use standard WP.



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 46

def calculate_owp(games_by_team)
  if games.count > 0
    sum_owp = games.inject(0.0) do |sum, game|
      sked = opponent_schedule game.opponent, games_by_team
      ow = sked.inject(0) { |wins, og| wins + og.wins }
      sum + (sked.empty? ? 0.0 : (ow.to_f / sked.count.to_f))
    end
    @owp = sum_owp / games.count.to_f
  end
end

#oowp ⇒ Object 



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 35

def oowp
  @oowp
end

#owp ⇒ Object 



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 31

def owp
  @owp
end

#rpi ⇒ Object 



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 39

def rpi
  @rpi ||= calculate_rpi
end

#rpi_win_percentage ⇒ Object 



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 23

def rpi_win_percentage
  if games.count > 0
    rpi_wins / (rpi_wins + rpi_losses)
  else
    0.0
  end
end

#win_percentage ⇒ Object 



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# File 'lib/crashing_the_dance/rpi_calculator/rpi.rb', line 15

def win_percentage
  if games.count > 0
    wins.to_f / (wins.to_f + losses.to_f)
  else
    0.0
  end
end