Created
May 25, 2011 06:49
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NetSVMLight: Cross validation for model selection
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using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Text; | |
using NetSVMLight; | |
using System.IO; | |
namespace NetSVMLightConsoleApplication1 | |
{ | |
class Program | |
{ | |
static void Main(string[] args) | |
{ | |
Utilities u = new Utilities(); | |
SVMLearn[] learners = new SVMLearn[10]; | |
Dictionary<double, Results> cvResults = new Dictionary<double, Results>(10); | |
String outputFolder = @"E:\kv\code\project\10foldcv"; | |
u.ConstructNFolds(@"E:\kv\project\combined.data", 10, outputFolder, r => r.StartsWith("-")); | |
for (int counter = 0; counter < 10; counter++) | |
{ | |
learners[counter] = new SVMLearn(); | |
learners[counter].mode = Mode.Classification; | |
learners[counter].kernelType = Kernel.Linear; | |
learners[counter].Cost = 0.35 + counter * 0.20; | |
learners[counter].RemoveInconsistentTrainingExamples = true; | |
cvResults.Add(learners[counter].Cost, u.PerformCrossValidation(outputFolder, false, | |
learners[counter])); | |
} | |
StreamWriter learningRate = new StreamWriter(Path.Combine(outputFolder, "learning.txt")); | |
foreach (KeyValuePair<double, Results> entry in cvResults) | |
{ | |
Console.WriteLine("Cost: {0}: Accuracy {1}, Precision {2}, Recall {3}", | |
entry.Key, entry.Value.accuracy, entry.Value.precision, entry.Value.recall); | |
learningRate.WriteLine(entry.Key + ", " + entry.Value.accuracy + ", " + | |
entry.Value.precision + ", " + entry.Value.recall); | |
} | |
Console.ReadLine(); | |
} | |
} | |
} |
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