aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

tasks a-s

Browse source
This commit is contained in:
Ingy döt Net 2013-04-10 23:57:08 -07:00
parent 47bf37c096
commit b83f433714
12433 changed files with 156208 additions and 123 deletions
Download patch file Download diff file Expand all files Collapse all files

52
Task/Probabilistic-choice/Java/probabilistic-choice-2.java Normal file
View file

@ -0,0 +1,52 @@
import java.util.EnumMap;
public class Prob {
public static long TRIALS= 1000000;
public enum Glyph{
ALEPH, BETH, GIMEL, DALETH, HE, WAW, ZAYIN, HETH;
}
public static EnumMap<Glyph, Double> probs = new EnumMap<Glyph, Double>(Glyph.class){{
put(Glyph.ALEPH, 1/5.0);
put(Glyph.BETH, 1/6.0);
put(Glyph.GIMEL, 1/7.0);
put(Glyph.DALETH, 1/8.0);
put(Glyph.HE, 1/9.0);
put(Glyph.WAW, 1/10.0);
put(Glyph.ZAYIN, 1/11.0);
put(Glyph.HETH, 1759./27720);
}};
public static EnumMap<Glyph, Double> counts = new EnumMap<Glyph, Double>(Glyph.class){{
put(Glyph.ALEPH, 0.);put(Glyph.BETH, 0.);
put(Glyph.GIMEL, 0.);put(Glyph.DALETH, 0.);
put(Glyph.HE, 0.);put(Glyph.WAW, 0.);
put(Glyph.ZAYIN, 0.);put(Glyph.HETH, 0.);
}};
public static void main(String[] args){
System.out.println("Target probabliities:\t" + probs);
for(long i = 0; i < TRIALS; i++){
Glyph choice = getChoice();
counts.put(choice, counts.get(choice) + 1);
}
//correct the counts to probablities in (0..1]
for(Glyph glyph:counts.keySet()){
counts.put(glyph, counts.get(glyph) / TRIALS);
}
System.out.println("Actual probabliities:\t" + counts);
}
private static Glyph getChoice() {
double rand = Math.random();
for(Glyph item:Glyph.values()){
if(rand < probs.get(item)){
return item;
}
rand -= probs.get(item);
}
return null;
}
}