libsvm.svm.info()方法的使用及代码示例

x33g5p2x  于2022-01-30 转载在 其他  
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本文整理了Java中libsvm.svm.info()方法的一些代码示例，展示了svm.info()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。svm.info()方法的具体详情如下：
包路径：libsvm.svm
类名称：svm
方法名：info

svm.info介绍

暂无

代码示例

代码示例来源：origin: tw.edu.ntu.csie/libsvm

svm.info("Exceeds max_iter in multiclass_prob\n");

代码示例来源：origin: tw.edu.ntu.csie/libsvm

private static double svm_svr_probability(svm_problem prob, svm_parameter param)
{
  int i;
  int nr_fold = 5;
  double[] ymv = new double[prob.l];
  double mae = 0;
  svm_parameter newparam = (svm_parameter)param.clone();
  newparam.probability = 0;
  svm_cross_validation(prob,newparam,nr_fold,ymv);
  for(i=0;i<prob.l;i++)
  {
    ymv[i]=prob.y[i]-ymv[i];
    mae += Math.abs(ymv[i]);
  }
  mae /= prob.l;
  double std=Math.sqrt(2*mae*mae);
  int count=0;
  mae=0;
  for(i=0;i<prob.l;i++)
    if (Math.abs(ymv[i]) > 5*std)
      count=count+1;
    else
      mae+=Math.abs(ymv[i]);
  mae /= (prob.l-count);
  svm.info("Prob. model for test data: target value = predicted value + z,\nz: Laplace distribution e^(-|z|/sigma)/(2sigma),sigma="+mae+"\n");
  return mae;
}

代码示例来源：origin: jzy3d/jzy3d-api

private static double svm_svr_probability(svm_problem prob, svm_parameter param)
{
  int i;
  int nr_fold = 5;
  double[] ymv = new double[prob.l];
  double mae = 0;
  svm_parameter newparam = (svm_parameter)param.clone();
  newparam.probability = 0;
  svm_cross_validation(prob,newparam,nr_fold,ymv);
  for(i=0;i<prob.l;i++)
  {
    ymv[i]=prob.y[i]-ymv[i];
    mae += Math.abs(ymv[i]);
  }        
  mae /= prob.l;
  double std=Math.sqrt(2*mae*mae);
  int count=0;
  mae=0;
  for(i=0;i<prob.l;i++)
    if (Math.abs(ymv[i]) > 5*std) 
      count=count+1;
    else 
      mae+=Math.abs(ymv[i]);
  mae /= (prob.l-count);
  svm.info("Prob. model for test data: target value = predicted value + z,\nz: Laplace distribution e^(-|z|/sigma)/(2sigma),sigma="+mae+"\n");
  return mae;
}

代码示例来源：origin: com.facebook.thirdparty/libsvm

private static double svm_svr_probability(svm_problem prob, svm_parameter param)
{
  int i;
  int nr_fold = 5;
  double[] ymv = new double[prob.l];
  double mae = 0;
  svm_parameter newparam = (svm_parameter)param.clone();
  newparam.probability = 0;
  svm_cross_validation(prob,newparam,nr_fold,ymv);
  for(i=0;i<prob.l;i++)
  {
    ymv[i]=prob.y[i]-ymv[i];
    mae += Math.abs(ymv[i]);
  }        
  mae /= prob.l;
  double std=Math.sqrt(2*mae*mae);
  int count=0;
  mae=0;
  for(i=0;i<prob.l;i++)
    if (Math.abs(ymv[i]) > 5*std) 
      count=count+1;
    else 
      mae+=Math.abs(ymv[i]);
  mae /= (prob.l-count);
  svm.info("Prob. model for test data: target value = predicted value + z,\nz: Laplace distribution e^(-|z|/sigma)/(2sigma),sigma="+mae+"\n");
  return mae;
}

代码示例来源：origin: jzy3d/jzy3d-api

private static void solve_nu_svr(svm_problem prob, svm_parameter param,
        double[] alpha, Solver.SolutionInfo si)
{
  int l = prob.l;
  double C = param.C;
  double[] alpha2 = new double[2*l];
  double[] linear_term = new double[2*l];
  byte[] y = new byte[2*l];
  int i;
  double sum = C * param.nu * l / 2;
  for(i=0;i<l;i++)
  {
    alpha2[i] = alpha2[i+l] = Math.min(sum,C);
    sum -= alpha2[i];
    
    linear_term[i] = - prob.y[i];
    y[i] = 1;
    linear_term[i+l] = prob.y[i];
    y[i+l] = -1;
  }
  Solver_NU s = new Solver_NU();
  s.Solve(2*l, new SVR_Q(prob,param), linear_term, y,
    alpha2, C, C, param.eps, si, param.shrinking);
  svm.info("epsilon = "+(-si.r)+"\n");
  
  for(i=0;i<l;i++)
    alpha[i] = alpha2[i] - alpha2[i+l];
}

代码示例来源：origin: jzy3d/jzy3d-api

double r = si.r;
svm.info("C = "+1/r+"\n");

代码示例来源：origin: com.facebook.thirdparty/libsvm

private static void solve_nu_svr(svm_problem prob, svm_parameter param,
        double[] alpha, Solver.SolutionInfo si)
{
  int l = prob.l;
  double C = param.C;
  double[] alpha2 = new double[2*l];
  double[] linear_term = new double[2*l];
  byte[] y = new byte[2*l];
  int i;
  double sum = C * param.nu * l / 2;
  for(i=0;i<l;i++)
  {
    alpha2[i] = alpha2[i+l] = Math.min(sum,C);
    sum -= alpha2[i];
    
    linear_term[i] = - prob.y[i];
    y[i] = 1;
    linear_term[i+l] = prob.y[i];
    y[i+l] = -1;
  }
  Solver_NU s = new Solver_NU();
  s.Solve(2*l, new SVR_Q(prob,param), linear_term, y,
    alpha2, C, C, param.eps, si, param.shrinking);
  svm.info("epsilon = "+(-si.r)+"\n");
  
  for(i=0;i<l;i++)
    alpha[i] = alpha2[i] - alpha2[i+l];
}

代码示例来源：origin: com.facebook.thirdparty/libsvm

private static void solve_epsilon_svr(svm_problem prob, svm_parameter param,
        double[] alpha, Solver.SolutionInfo si)
{
  int l = prob.l;
  double[] alpha2 = new double[2*l];
  double[] linear_term = new double[2*l];
  byte[] y = new byte[2*l];
  int i;
  for(i=0;i<l;i++)
  {
    alpha2[i] = 0;
    linear_term[i] = param.p - prob.y[i];
    y[i] = 1;
    alpha2[i+l] = 0;
    linear_term[i+l] = param.p + prob.y[i];
    y[i+l] = -1;
  }
  Solver s = new Solver();
  s.Solve(2*l, new SVR_Q(prob,param), linear_term, y,
    alpha2, param.C, param.C, param.eps, si, param.shrinking);
  double sum_alpha = 0;
  for(i=0;i<l;i++)
  {
    alpha[i] = alpha2[i] - alpha2[i+l];
    sum_alpha += Math.abs(alpha[i]);
  }
  svm.info("nu = "+sum_alpha/(param.C*l)+"\n");
}

代码示例来源：origin: com.facebook.thirdparty/libsvm

double r = si.r;
svm.info("C = "+1/r+"\n");

代码示例来源：origin: tw.edu.ntu.csie/libsvm

private static void solve_nu_svr(svm_problem prob, svm_parameter param,
        double[] alpha, Solver.SolutionInfo si)
{
  int l = prob.l;
  double C = param.C;
  double[] alpha2 = new double[2*l];
  double[] linear_term = new double[2*l];
  byte[] y = new byte[2*l];
  int i;
  double sum = C * param.nu * l / 2;
  for(i=0;i<l;i++)
  {
    alpha2[i] = alpha2[i+l] = Math.min(sum,C);
    sum -= alpha2[i];
    linear_term[i] = - prob.y[i];
    y[i] = 1;
    linear_term[i+l] = prob.y[i];
    y[i+l] = -1;
  }
  Solver_NU s = new Solver_NU();
  s.Solve(2*l, new SVR_Q(prob,param), linear_term, y,
    alpha2, C, C, param.eps, si, param.shrinking);
  svm.info("epsilon = "+(-si.r)+"\n");
  for(i=0;i<l;i++)
    alpha[i] = alpha2[i] - alpha2[i+l];
}

代码示例来源：origin: tw.edu.ntu.csie/libsvm

private static void solve_epsilon_svr(svm_problem prob, svm_parameter param,
        double[] alpha, Solver.SolutionInfo si)
{
  int l = prob.l;
  double[] alpha2 = new double[2*l];
  double[] linear_term = new double[2*l];
  byte[] y = new byte[2*l];
  int i;
  for(i=0;i<l;i++)
  {
    alpha2[i] = 0;
    linear_term[i] = param.p - prob.y[i];
    y[i] = 1;
    alpha2[i+l] = 0;
    linear_term[i+l] = param.p + prob.y[i];
    y[i+l] = -1;
  }
  Solver s = new Solver();
  s.Solve(2*l, new SVR_Q(prob,param), linear_term, y,
    alpha2, param.C, param.C, param.eps, si, param.shrinking);
  double sum_alpha = 0;
  for(i=0;i<l;i++)
  {
    alpha[i] = alpha2[i] - alpha2[i+l];
    sum_alpha += Math.abs(alpha[i]);
  }
  svm.info("nu = "+sum_alpha/(param.C*l)+"\n");
}

代码示例来源：origin: tw.edu.ntu.csie/libsvm

double r = si.r;
svm.info("C = "+1/r+"\n");

代码示例来源：origin: jzy3d/jzy3d-api

private static void solve_epsilon_svr(svm_problem prob, svm_parameter param,
        double[] alpha, Solver.SolutionInfo si)
{
  int l = prob.l;
  double[] alpha2 = new double[2*l];
  double[] linear_term = new double[2*l];
  byte[] y = new byte[2*l];
  int i;
  for(i=0;i<l;i++)
  {
    alpha2[i] = 0;
    linear_term[i] = param.p - prob.y[i];
    y[i] = 1;
    alpha2[i+l] = 0;
    linear_term[i+l] = param.p + prob.y[i];
    y[i+l] = -1;
  }
  Solver s = new Solver();
  s.Solve(2*l, new SVR_Q(prob,param), linear_term, y,
    alpha2, param.C, param.C, param.eps, si, param.shrinking);
  double sum_alpha = 0;
  for(i=0;i<l;i++)
  {
    alpha[i] = alpha2[i] - alpha2[i+l];
    sum_alpha += Math.abs(alpha[i]);
  }
  svm.info("nu = "+sum_alpha/(param.C*l)+"\n");
}

代码示例来源：origin: tw.edu.ntu.csie/libsvm

private static void solve_c_svc(svm_problem prob, svm_parameter param,
        double[] alpha, Solver.SolutionInfo si,
        double Cp, double Cn)
{
  int l = prob.l;
  double[] minus_ones = new double[l];
  byte[] y = new byte[l];
  int i;
  for(i=0;i<l;i++)
  {
    alpha[i] = 0;
    minus_ones[i] = -1;
    if(prob.y[i] > 0) y[i] = +1; else y[i] = -1;
  }
  Solver s = new Solver();
  s.Solve(l, new SVC_Q(prob,param,y), minus_ones, y,
    alpha, Cp, Cn, param.eps, si, param.shrinking);
  double sum_alpha=0;
  for(i=0;i<l;i++)
    sum_alpha += alpha[i];
  if (Cp==Cn)
    svm.info("nu = "+sum_alpha/(Cp*prob.l)+"\n");
  for(i=0;i<l;i++)
    alpha[i] *= y[i];
}

代码示例来源：origin: com.facebook.thirdparty/libsvm

private static void solve_c_svc(svm_problem prob, svm_parameter param,
        double[] alpha, Solver.SolutionInfo si,
        double Cp, double Cn)
{
  int l = prob.l;
  double[] minus_ones = new double[l];
  byte[] y = new byte[l];
  int i;
  for(i=0;i<l;i++)
  {
    alpha[i] = 0;
    minus_ones[i] = -1;
    if(prob.y[i] > 0) y[i] = +1; else y[i] = -1;
  }
  Solver s = new Solver();
  s.Solve(l, new SVC_Q(prob,param,y), minus_ones, y,
    alpha, Cp, Cn, param.eps, si, param.shrinking);
  double sum_alpha=0;
  for(i=0;i<l;i++)
    sum_alpha += alpha[i];
  if (Cp==Cn)
    svm.info("nu = "+sum_alpha/(Cp*prob.l)+"\n");
  for(i=0;i<l;i++)
    alpha[i] *= y[i];
}

代码示例来源：origin: jzy3d/jzy3d-api

private static void solve_c_svc(svm_problem prob, svm_parameter param,
        double[] alpha, Solver.SolutionInfo si,
        double Cp, double Cn)
{
  int l = prob.l;
  double[] minus_ones = new double[l];
  byte[] y = new byte[l];
  int i;
  for(i=0;i<l;i++)
  {
    alpha[i] = 0;
    minus_ones[i] = -1;
    if(prob.y[i] > 0) y[i] = +1; else y[i]=-1;
  }
  Solver s = new Solver();
  s.Solve(l, new SVC_Q(prob,param,y), minus_ones, y,
    alpha, Cp, Cn, param.eps, si, param.shrinking);
  double sum_alpha=0;
  for(i=0;i<l;i++)
    sum_alpha += alpha[i];
  if (Cp==Cn)
    svm.info("nu = "+sum_alpha/(Cp*prob.l)+"\n");
  for(i=0;i<l;i++)
    alpha[i] *= y[i];
}

代码示例来源：origin: com.facebook.thirdparty/libsvm

svm.info("obj = "+si.obj+", rho = "+si.rho+"\n");
svm.info("nSV = "+nSV+", nBSV = "+nBSV+"\n");

代码示例来源：origin: tw.edu.ntu.csie/libsvm

svm.info("\nWARNING: using -h 0 may be faster\n");

代码示例来源：origin: jzy3d/jzy3d-api

svm.info("\nWarning: using -h 0 may be faster\n");

代码示例来源：origin: com.facebook.thirdparty/libsvm

svm.info("\nWARNING: using -h 0 may be faster\n");

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