/// <summary>
/// Calculates the modified unigram precision score as described in section 2.1 of the paper.
/// </summary>
/// <param name="reference">The reference as a string.</param>
/// <param name="candidate">The candidate as a string.</param>
/// <returns>The Modified n-gram precision score.</returns>
public double ModifiedUnigramPrecision(string reference, string candidate)
{
var referenceCollector = new NGramCollector(reference);
var candidateCollector = new NGramCollector(candidate);
return(ModifiedUnigramPrecision(referenceCollector, candidateCollector));
}
public void TestGetTriGramNoPunctuation()
{
var testString = "this, is a test string";
var expected = new [] { "this is a", "is a test", "a test string" };
var collector = new NGramCollector(testString, 3, stripPunctuation: true);
var result = collector.Collect();
Assert.AreEqual(expected, result);
}
public void TestGetTriGrams()
{
var testString = "this is a test string";
var expected = new [] { "this is a", "is a test", "a test string" };
var collector = new NGramCollector(testString, 3);
var result = collector.Collect();
Assert.AreEqual(expected, result);
}
public void TestSimplePrecision()
{
var candidate = "the the the the the the the.";
var ref1 = "The cat is on the mat.";
var candidateCollector = new NGramCollector(candidate);
var refCollector = new NGramCollector(ref1);
var bleu = new BleuScore();
var precision = bleu.ModifiedUnigramPrecision(refCollector, candidateCollector);
double expected = 2.0d / 7.0d;
Assert.AreEqual(expected, precision);
}
