public static void Test()
{
//Testing
int iterations = 100000;
LevenshteinMatrix matrix = new LevenshteinMatrix();
var minLength = 10;
var lengthDiv = 20;
Console.WriteLine("Start TESTING");
while (--iterations > 0)
{
var a = RandomString(random.Next(lengthDiv) + minLength);
var b = RandomString(random.Next(lengthDiv) + minLength);
var lev1 = matrix.CalculateLevenshteinDistance(a, b);
var lev2 = matrix.CalculateLevenshteinDistance(a, b, true);
//Console.WriteLine($"({lev1},{lev2})");
//Console.WriteLine(iterations);
if (lev1 != lev2)
{
Console.WriteLine("ERROR:");
Console.WriteLine(a);
Console.WriteLine(b);
Console.WriteLine();
Console.WriteLine($"HammingDistance: {Helper.HammingDistance(a,b)}");
Console.WriteLine($"LevenshteinDistance 1: {lev1}");
Console.WriteLine($"LevenshteinDistance 2: {lev2}");
Console.WriteLine();
break;
}
}
Console.WriteLine("End TESTING");
}
public static void SampleData()
{
Console.WriteLine("Hello World!\n");
//var input1 = Console.ReadLine();
//var input2 = Console.ReadLine();
var testData = new List <(string, string)> {
("ababab", "abaabab"),
("Peter", "Petra"),
("abcdijklm", "efgh"),
("aabb", "bbcc"),
("aaaa", "aaaabcaadef"),
("aaaabaaaaaaaab", "baaabaaaaaaaaa"),
("baabaaaaba", "abaaaaaaaaaaaaaaaaaa")
};
var data = testData[4];
var a = data.Item1;
var b = data.Item2;
var dir = Path.Combine(Path.GetTempPath(), "Levenshtein", "data");
Directory.CreateDirectory(dir);
FileStream ostrm;
StreamWriter writer;
TextWriter oldOut = Console.Out;
try
{
ostrm = new FileStream(Path.Combine(dir, "console.txt"), FileMode.Create, FileAccess.Write);
writer = new StreamWriter(ostrm);
}
catch (Exception e)
{
Console.WriteLine("Cannot open Redirect.txt for writing");
Console.WriteLine(e.Message);
return;
}
Console.SetOut(writer);
var start = DateTime.Now;
var matrix = new LevenshteinMatrix(a, b, true);
Console.WriteLine($"\nLevenshtein Time: {(DateTime.Now - start).TotalMilliseconds}");
Console.WriteLine();
Console.WriteLine(a);
Console.WriteLine(b);
Console.WriteLine();
Console.WriteLine($"HammingDistance: {Helper.HammingDistance(a, b)}");
Console.WriteLine();
Console.WriteLine(matrix);
Console.WriteLine($"LevenshteinDistance: {matrix.LevenshteinDistance}");
Console.WriteLine();
matrix.CalculateLevenshteinDistance(a, b);
Console.WriteLine(matrix);
Console.WriteLine($"LevenshteinDistance: {matrix.LevenshteinDistance}");
Console.WriteLine();
Console.SetOut(oldOut);
writer.Close();
ostrm.Close();
Console.WriteLine("Done");
}
public static void Benchmark()
{
//BENCHMARK
bool printBenchData = false;
LevenshteinMatrix matrix = new LevenshteinMatrix();
DateTime start;
DateTime end;
var minLength = 2000;
var lengthDiv = 100;
var numPairs = 20;
var iterations = 2;
var benchData = new List <(string, string)>();
for (int i = 0; i < numPairs; i++)
{
benchData.Add((RandomString(random.Next(lengthDiv) + minLength), RandomString(random.Next(lengthDiv) + minLength)));
}
var dir = Path.Combine(Path.GetTempPath(), "Levenshtein", "data");
Directory.CreateDirectory(dir);
var list = new List <string>();
benchData.ForEach((t) => list.Add($"'{t.Item1}','{t.Item2}'"));
File.WriteAllLines(Path.Combine(dir, $"benchData{DateTime.Now.Ticks}.txt"), list);
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("BENCHMARK Printing BenchData");
Console.WriteLine();
if (printBenchData)
{
foreach (var item in benchData)
{
var lev1 = matrix.CalculateLevenshteinDistance(item.Item1, item.Item2);
//Console.WriteLine(matrix);
//Console.WriteLine($"LevenshteinDistance: {lev1}");
//Console.WriteLine();
var lev2 = matrix.CalculateLevenshteinDistance(item.Item1, item.Item2, true);
Console.WriteLine(matrix);
Console.WriteLine($"Levenshtein Distance: {lev2}");
Console.WriteLine($"Hamming Distance: {matrix.HammingDistance}");
Console.WriteLine();
Debug.Assert(lev1 == lev2);
}
}
Console.WriteLine();
Console.WriteLine("BENCHMARK without heuristic");
start = DateTime.Now;
for (int i = 0; i < iterations; i++)
{
foreach (var item in benchData)
{
matrix.CalculateLevenshteinDistance(item.Item1, item.Item2);
}
}
end = DateTime.Now;
Console.WriteLine();
Console.WriteLine($"Total Bench Time: {(end - start).TotalMilliseconds}");
Console.WriteLine($"ms/lev Time: {(end - start).TotalMilliseconds / (iterations * numPairs)}");
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("BENCHMARK with heuristic");
start = DateTime.Now;
for (int i = 0; i < iterations; i++)
{
foreach (var item in benchData)
{
matrix.CalculateLevenshteinDistance(item.Item1, item.Item2, true);
}
}
end = DateTime.Now;
Console.WriteLine();
Console.WriteLine($"Total Bench Time: {(end - start).TotalMilliseconds}");
Console.WriteLine($"ms/lev Time: {(end - start).TotalMilliseconds / (iterations * numPairs)}");
}
