Class: TrueSkillObject
- Inherits:
-
Object
- Object
- TrueSkillObject
- Defined in:
- lib/TrueSkill/TrueSkill.rb
Instance Attribute Summary collapse
-
#beta ⇒ Object
Returns the value of attribute beta.
-
#draw_probability ⇒ Object
Returns the value of attribute draw_probability.
-
#mu ⇒ Object
Returns the value of attribute mu.
-
#sigma ⇒ Object
Returns the value of attribute sigma.
-
#tau ⇒ Object
Returns the value of attribute tau.
Instance Method Summary collapse
- #build_factor_graph(rating_groups, ranks) ⇒ Object
-
#initialize(mu = MU, sigma = SIGMA, beta = BETA, tau = TAU, draw_probability = DRAW_PROBABILITY) ⇒ TrueSkillObject
constructor
A new instance of TrueSkillObject.
- #make_as_global ⇒ Object
- #match_quality(rating_groups) ⇒ Object
- #Rating(mu = nil, sigma = nil) ⇒ Object
- #run_schedule(rating_layer, perf_layer, teamperf_layer, teamdiff_layer, trunc_layer, min_delta = DELTA) ⇒ Object
- #transform_ratings(rating_groups, ranks = nil, min_delta = DELTA) ⇒ Object
- #validate_rating_groups(rating_groups) ⇒ Object
Constructor Details
#initialize(mu = MU, sigma = SIGMA, beta = BETA, tau = TAU, draw_probability = DRAW_PROBABILITY) ⇒ TrueSkillObject
Returns a new instance of TrueSkillObject.
12 13 14 15 16 17 18 |
# File 'lib/TrueSkill/TrueSkill.rb', line 12 def initialize(mu=MU, sigma=SIGMA, beta=BETA, tau=TAU,draw_probability=DRAW_PROBABILITY) @mu=mu @sigma=sigma @beta=beta @tau=tau @draw_probability=draw_probability end |
Instance Attribute Details
#beta ⇒ Object
Returns the value of attribute beta.
4 5 6 |
# File 'lib/TrueSkill/TrueSkill.rb', line 4 def beta @beta end |
#draw_probability ⇒ Object
Returns the value of attribute draw_probability.
4 5 6 |
# File 'lib/TrueSkill/TrueSkill.rb', line 4 def draw_probability @draw_probability end |
#mu ⇒ Object
Returns the value of attribute mu.
4 5 6 |
# File 'lib/TrueSkill/TrueSkill.rb', line 4 def mu @mu end |
#sigma ⇒ Object
Returns the value of attribute sigma.
4 5 6 |
# File 'lib/TrueSkill/TrueSkill.rb', line 4 def sigma @sigma end |
#tau ⇒ Object
Returns the value of attribute tau.
4 5 6 |
# File 'lib/TrueSkill/TrueSkill.rb', line 4 def tau @tau end |
Instance Method Details
#build_factor_graph(rating_groups, ranks) ⇒ Object
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 |
# File 'lib/TrueSkill/TrueSkill.rb', line 48 def build_factor_graph(,ranks) =.flatten size=.length group_size=.length =[] size.times { << Variable.new} perf_vars=[] size.times { perf_vars << Variable.new} teamperf_vars=[] group_size.times { teamperf_vars << Variable.new} teamdiff_vars=[] (group_size-1).times { teamdiff_vars << Variable.new} team_sizes=_team_sizes() get_perf_vars_by_team=lambda do |team| if team > 0 start=team_sizes[team-1] else start=0 end endv=team_sizes[team] return perf_vars[start,endv] end =lambda do Enumerator.new do |yielder| .zip().each do |,| yielder.yield(PriorFactor.new(,,@tau)) end end end build_perf_layer=lambda do Enumerator.new do |yielder| .zip(perf_vars).each do |,perf_var| yielder.yield(LikelihoodFactor.new(,perf_var,@beta**2)) end end end build_teamperf_layer=lambda do Enumerator.new do |yielder| teamperf_vars.each_with_index do |teamperf_var,team| child_perf_vars = get_perf_vars_by_team.call(team) yielder.yield(SumFactor.new(teamperf_var,child_perf_vars,[1]*child_perf_vars.length)) end end end build_teamdiff_layer=lambda do Enumerator.new do |yielder| teamdiff_vars.each_with_index do |teamdiff_var,team| yielder.yield(SumFactor.new(teamdiff_var,teamperf_vars[team,team=2],[+1,-1])) end end end build_trunc_layer=lambda do Enumerator.new do |yielder| teamdiff_vars.each_with_index do |teamdiff_var,x| size=0 [x,x+2].each do |group| size+=group.length end draw_margin=calc_draw_margin(@draw_probability,@beta,size) if ranks[x]==ranks[x+1] v_func,w_func=$v_drawFunc,$w_drawFunc else v_func,w_func=$vFunc,$wFunc end yielder.yield(TruncateFactor.new(teamdiff_var,v_func,w_func,draw_margin)) end end end return Array(.call),Array(build_perf_layer.call),Array(build_teamperf_layer.call),Array(build_teamdiff_layer.call),Array(build_trunc_layer.call) end |
#make_as_global ⇒ Object
31 32 33 |
# File 'lib/TrueSkill/TrueSkill.rb', line 31 def make_as_global return setup(nil,nil,nil,nil,nil,self) end |
#match_quality(rating_groups) ⇒ Object
211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 |
# File 'lib/TrueSkill/TrueSkill.rb', line 211 def match_quality() =() =.flatten length=.length mean_rows=[] .each {|r| mean_rows << [r.mu] } mean_matrix=Matrix.new(mean_rows) variance_matrix=Proc.new do |width,height| Enumerator.new do |yielder| sig=[] .each {|x| sig << (x.sigma**2)} sig.each_with_index do |variance,x| yielder.yield [x,x],variance end end end variance_matrix=Matrix.new(nil,length,length,:func=>variance_matrix) #pp variance_matrix rotated_a_matrix=Proc.new do |set_width,set_height| Enumerator.new do |yielder| t=0 r2=0 x2=0 .take(.size-1).zip(.drop(1)).each_with_index do |y,r| cur=y[0] nex=y[1] z=0 (t...t+cur.length).each do |x| yielder.yield [r,x],1 t+=1 z=x end z+=1 (z...z+nex.length).each do |x| pp yielder.yield [r,x],-1 z=x end r2=r x2=z end set_width.call(x2+1) set_height.call(r2+1) end end rotated_a_matrix=Matrix.new(nil,nil,nil,:func=>rotated_a_matrix) a_matrix = rotated_a_matrix.transpose() _ata = (@beta ** 2) * rotated_a_matrix * a_matrix _atsa=rotated_a_matrix*(variance_matrix*a_matrix) start=mean_matrix.transpose()*a_matrix middle=_ata+_atsa endv=rotated_a_matrix*mean_matrix e_arg=(-0.5*start*middle.inverse()*endv).determinant() s_arg=_ata.determinant()/middle.determinant() return Math.exp(e_arg)*Math.sqrt(s_arg) end |
#Rating(mu = nil, sigma = nil) ⇒ Object
21 22 23 24 25 26 27 28 29 |
# File 'lib/TrueSkill/TrueSkill.rb', line 21 def Rating(mu=nil,sigma=nil) if mu.nil? mu=@mu end if sigma.nil? sigma=@sigma end return Rating.new mu,sigma end |
#run_schedule(rating_layer, perf_layer, teamperf_layer, teamdiff_layer, trunc_layer, min_delta = DELTA) ⇒ Object
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 |
# File 'lib/TrueSkill/TrueSkill.rb', line 128 def run_schedule(, perf_layer, teamperf_layer,teamdiff_layer, trunc_layer, min_delta=DELTA) [,perf_layer,teamperf_layer].flatten.each do |f| f.down end teamdiff_len=teamdiff_layer.length (10).times do |x| if teamdiff_len==1 teamdiff_layer[0].down delta=trunc_layer[0].up else delta=0 (teamdiff_len-1).times do |x2| teamdiff_layer[x2].down delta=[delta,trunc_layer[x2].up].max teamdiff_layer[x2].up(1) end (teamdiff_len-1).step(0,-1) do |x2| teamdiff_layer[x2].down delta=[delta,trunc_layer[x2].up].max teamdiff_layer[x2].up(0) end end if delta<=min_delta break end end teamdiff_layer.first.up(0) teamdiff_layer.last.up(1) teamperf_layer.each do |f| (f.vars.length-1).times do |x| f.up(x) end end perf_layer.each do |f| f.up end end |
#transform_ratings(rating_groups, ranks = nil, min_delta = DELTA) ⇒ Object
165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 |
# File 'lib/TrueSkill/TrueSkill.rb', line 165 def (, ranks=nil, min_delta=DELTA) =() #pp "Start groups" #pp rating_groups group_size=.length if ranks.nil? ranks=Array(0..group_size-1) end sorting=ranks.zip().each_with_index.to_a.map {|x| x.reverse}.sort { |x,y| x[1][0] <=> y[1][0]} sorted_groups=[] sorting.each do |x,g| sorted_groups << g[1] end sorted_ranks=ranks.sort() unsorting_hint=[] sorting.each do |x,g| unsorting_hint << x end #pp "Sorted Groups" #pp sorted_groups #pp "Sorted Ranks" #pp sorted_ranks layers=build_factor_graph(sorted_groups,sorted_ranks) run_schedule(layers[0],layers[1],layers[2],layers[3],layers[4]) ,team_sizes=layers[0],_team_sizes(sorted_groups) #pp "Team Sizes" #pp team_sizes #pp "Rating Layer" #pp rating_layer transformed_groups=[] ([0]+team_sizes.take(team_sizes.size - 1)).zip(team_sizes).each do |start,ending| group=[] [start...ending].each do |f| group << Rating.new(f.var.mu,f.var.sigma) end transformed_groups << Array(group) end #pp "Transformed" #pp transformed_groups unsorting=unsorting_hint.zip(transformed_groups).sort { |x,y| x[0]<=>y[0]} output=[] unsorting.each do |x,g| output << g end return output end |
#validate_rating_groups(rating_groups) ⇒ Object
34 35 36 37 38 39 40 41 42 43 44 45 46 47 |
# File 'lib/TrueSkill/TrueSkill.rb', line 34 def () .each do |group| if group.is_a? Rating group=[group,] end if group.length==0 raise "each group must contain multiple ratings" end end if .length<2 raise "need multiple rating groups" end return end |