/// <summary>
///
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
public static SVMModel LoadModel(string filename)
{
if (String.IsNullOrWhiteSpace(filename) || !File.Exists(filename))
{
return(null);
}
IntPtr ptr_filename = Marshal.StringToHGlobalAnsi(filename);
IntPtr ptr_model = libsvm.svm_load_model(ptr_filename);
Marshal.FreeHGlobal(ptr_filename);
ptr_filename = IntPtr.Zero;
if (ptr_model == IntPtr.Zero)
{
return(null);
}
else
{
SVMModel model = SVMModel.Convert(ptr_model);
// There is a little memory leackage here !!!
libsvm.svm_free_model_content(ptr_model);
ptr_model = IntPtr.Zero;
return(model);
}
}
public static SVMModel Convert(IntPtr ptr)
{
if (ptr == IntPtr.Zero)
{
return(null);
}
svm_model x = (svm_model)Marshal.PtrToStructure(ptr, typeof(svm_model));
return(SVMModel.Convert(x));
}
/// <summary>
/// This function constructs and returns an SVM model according to the given training data and parameters.
/// </summary>
/// <param name="problem">Training data.</param>
/// <param name="parameter">Parameter set.</param>
/// <returns>SVM model according to the given training data and parameters.</returns>
public static SVMModel Train(SVMProblem problem, SVMParameter parameter)
{
IntPtr ptr_problem = SVMProblem.Allocate(problem);
IntPtr ptr_parameter = SVMParameter.Allocate(parameter);
IntPtr ptr_model = libsvm.svm_train(ptr_problem, ptr_parameter);
SVMModel model = SVMModel.Convert(ptr_model);
SVMProblem.Free(ptr_problem);
SVMParameter.Free(ptr_parameter);
libsvm.svm_free_model_content(ptr_model);
return(model);
}
/// <summary>
/// This function constructs and returns an SVM model according to the given training data and parameters.
/// </summary>
/// <param name="problem">Training data.</param>
/// <param name="parameter">Parameter set.</param>
/// <returns>SVM model according to the given training data and parameters.</returns>
public static SVMModel Train(SVMProblem problem, SVMParameter parameter)
{
if (problem == null)
{
throw new ArgumentNullException("problem");
}
if (parameter == null)
{
throw new ArgumentNullException("parameter");
}
IntPtr ptr_problem = SVMProblem.Allocate(problem);
IntPtr ptr_parameter = SVMParameter.Allocate(parameter);
IntPtr ptr_model = libsvm.svm_train(ptr_problem, ptr_parameter);
SVMModel model = SVMModel.Convert(ptr_model);
SVMProblem.Free(ptr_problem);
SVMParameter.Free(ptr_parameter);
libsvm.svm_free_model_content(ptr_model);
return(model);
}