| public ParseGetProbability ( Sentence s ) : double | ||
| s | Sentence | |
| return | double | |
private static void ExecuteTest(Grammar g, List<Sentence> sentences) {
CNFGrammar h = g.ToCNF();
var earley = new EarleyParser(g);
var cyk = new CykParser(h);
foreach (var sentence in sentences) {
var p1 = cyk.ParseGetProbability(sentence);
var p2 = earley.ParseGetProbability(sentence);
Helpers.AssertNear(p1, p2);
}
}
public double Cyk(Sentence s) {
var cyk = new Parsers.CYK.CykParser(this);
return cyk.ParseGetProbability(s);
}
public void RandomParsingTest(
int _numGrammars = 10000,
int _numNonterminals = 10,
int _numTerminals = 5,
int _numProductions = 30,
int _maxProductionLength = 8,
int _maxInputLength = 6,
int seed = 0
) {
var printStatus = true;
var range = Enumerable.Range(0, _numTerminals);
var terminals = new List<Terminal>(range.Select((x) => Terminal.Of("x" + x)));
Console.WriteLine("Preparing sentences");
var preparedSentences = new List<Sentence>();
for (int length = 0; length <= _maxInputLength; length++) {
var combinations = CFGLibTest.Helpers.CombinationsWithRepetition(terminals, length);
foreach (var target in combinations) {
var sentence = new Sentence(target);
preparedSentences.Add(sentence);
}
}
var randg = new GrammarGenerator(seed);
var preparedGrammars = new List<Grammar>(_numGrammars);
var preparedGrammarsCNF = new List<CNFGrammar>(_numGrammars);
Console.WriteLine("Preparing grammars");
for (int i = 0; i < _numGrammars; i++) {
Grammar g = null;
while (g == null) {
// g = randg.NextCNF(_numNonterminals, _numProductions, terminals);
g = randg.NextCFG(_numNonterminals, _numProductions, _maxProductionLength, terminals, true);
if (g.Productions.Count() == 0) {
g = null;
}
}
// Console.WriteLine("---------------{0}/{1}---------------", i.ToString("D5"), _numGrammars.ToString("D5"));
// Console.WriteLine(g.ToCodeString());
var h = g.ToCNF();
//return;
// Console.WriteLine(g);
// g.PrintProbabilities(2, 3);
preparedGrammars.Add(g);
preparedGrammarsCNF.Add(h);
}
Console.WriteLine("starting");
var sw = Stopwatch.StartNew();
int count = 0;
for (int grammarIndex = 0; grammarIndex < _numGrammars; grammarIndex++) {
if (printStatus) {
Console.WriteLine("---------------{0}/{1}---------------", grammarIndex.ToString("D5"), _numGrammars.ToString("D5"));
}
var g = preparedGrammars[grammarIndex];
var h = preparedGrammarsCNF[grammarIndex];
var earley = new EarleyParser(g);
var cyk = new CykParser(h);
// Console.WriteLine(g.ToCodeString());
// Console.Write("{0}, ", count);
count++;
var accepts = 0;
foreach (var sentence in preparedSentences) {
try {
var p1 = earley.ParseGetProbability(sentence);
var p2 = cyk.ParseGetProbability(sentence);
if (!Helpers.IsNear(p2, p1)) {
throw new Exception();
}
var accepts1 = p1 > 0;
var accepts2 = p2 > 0;
if (accepts2) {
accepts++;
}
} catch (Exception) {
Report(g, sentence);
throw;
}
}
if (printStatus) {
Console.WriteLine("Accepted {0} / {1}", accepts, preparedSentences.Count);
}
}
sw.Stop();
Console.WriteLine();
Console.WriteLine("inner Elapsed: {0}s", sw.Elapsed.TotalMilliseconds / 1000.0);
// Console.WriteLine("Per CYK: {0}ms", sw.Elapsed.TotalMilliseconds / (_numGrammars * preparedSentences.Count));
}
public double Cyk(Sentence s)
{
var cyk = new Parsers.CYK.CykParser(this);
return(cyk.ParseGetProbability(s));
}