weka.core.Utils.gr()方法的使用及代码示例

x33g5p2x  于2022-02-01 转载在 其他  
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本文整理了Java中weka.core.Utils.gr()方法的一些代码示例，展示了Utils.gr()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。Utils.gr()方法的具体详情如下：
包路径：weka.core.Utils
类名称：Utils
方法名：gr

Utils.gr介绍

[英]Tests if a is greater than b.
[中]测试a是否大于b。

代码示例

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Returns number of classes actually occuring in given bag.
 */
public final int actualNumClasses(int bagIndex) {
 int returnValue = 0;
 int i;
 for (i = 0; i < m_perClass.length; i++) {
  if (Utils.gr(m_perClassPerBag[bagIndex][i], 0)) {
   returnValue++;
  }
 }
 return returnValue;
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Returns number of classes actually occuring in distribution.
 */
public final int actualNumClasses() {
 int returnValue = 0;
 int i;
 for (i = 0; i < m_perClass.length; i++) {
  if (Utils.gr(m_perClass[i], 0)) {
   returnValue++;
  }
 }
 return returnValue;
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Returns number of non-empty bags of distribution.
 */
public final int actualNumBags() {
 int returnValue = 0;
 int i;
 for (i = 0; i < m_perBag.length; i++) {
  if (Utils.gr(m_perBag[i], 0)) {
   returnValue++;
  }
 }
 return returnValue;
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Returns number of non-empty bags of distribution.
 */
public final int actualNumBags() {
 int returnValue = 0;
 int i;
 for (i = 0; i < m_perBag.length; i++) {
  if (Utils.gr(m_perBag[i], 0)) {
   returnValue++;
  }
 }
 return returnValue;
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Returns number of classes actually occuring in distribution.
 */
public final int actualNumClasses() {
 int returnValue = 0;
 int i;
 for (i = 0; i < m_perClass.length; i++) {
  if (Utils.gr(m_perClass[i], 0)) {
   returnValue++;
  }
 }
 return returnValue;
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Returns number of classes actually occuring in given bag.
 */
public final int actualNumClasses(int bagIndex) {
 int returnValue = 0;
 int i;
 for (i = 0; i < m_perClass.length; i++) {
  if (Utils.gr(m_perClassPerBag[bagIndex][i], 0)) {
   returnValue++;
  }
 }
 return returnValue;
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Returns class with highest frequency over all bags.
 */
public final int maxClass() {
 double maxCount = 0;
 int maxIndex = 0;
 int i;
 for (i = 0; i < m_perClass.length; i++) {
  if (Utils.gr(m_perClass[i], maxCount)) {
   maxCount = m_perClass[i];
   maxIndex = i;
  }
 }
 return maxIndex;
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Returns class with highest frequency over all bags.
 */
public final int maxClass() {
 double maxCount = 0;
 int maxIndex = 0;
 int i;
 for (i = 0; i < m_perClass.length; i++) {
  if (Utils.gr(m_perClass[i], maxCount)) {
   maxCount = m_perClass[i];
   maxIndex = i;
  }
 }
 return maxIndex;
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Returns relative frequency of class for given bag.
 */
public final double prob(int classIndex, int intIndex) {
 if (Utils.gr(m_perBag[intIndex], 0)) {
  return m_perClassPerBag[intIndex][classIndex] / m_perBag[intIndex];
 } else {
  return prob(classIndex);
 }
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Returns relative frequency of class for given bag.
 */
public final double laplaceProb(int classIndex, int intIndex) {
 if (Utils.gr(m_perBag[intIndex], 0)) {
  return (m_perClassPerBag[intIndex][classIndex] + 1.0)
   / (m_perBag[intIndex] + m_perClass.length);
 } else {
  return laplaceProb(classIndex);
 }
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Returns relative frequency of class for given bag.
 */
public final double prob(int classIndex, int intIndex) {
 if (Utils.gr(m_perBag[intIndex], 0)) {
  return m_perClassPerBag[intIndex][classIndex] / m_perBag[intIndex];
 } else {
  return prob(classIndex);
 }
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Returns relative frequency of class for given bag.
 */
public final double laplaceProb(int classIndex, int intIndex) {
 if (Utils.gr(m_perBag[intIndex], 0)) {
  return (m_perClassPerBag[intIndex][classIndex] + 1.0)
   / (m_perBag[intIndex] + m_perClass.length);
 } else {
  return laplaceProb(classIndex);
 }
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Returns the log-odds for a given probabilitiy.
 * 
 * @param prob the probabilitiy
 * 
 * @return the log-odds after the probability has been mapped to [Utils.SMALL,
 *         1-Utils.SMALL]
 */
public static/* @pure@ */double probToLogOdds(double prob) {
 if (gr(prob, 1) || (sm(prob, 0))) {
  throw new IllegalArgumentException("probToLogOdds: probability must "
   + "be in [0,1] " + prob);
 }
 double p = SMALL + (1.0 - 2 * SMALL) * prob;
 return Math.log(p / (1 - p));
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Returns the log-odds for a given probabilitiy.
 * 
 * @param prob the probabilitiy
 * 
 * @return the log-odds after the probability has been mapped to [Utils.SMALL,
 *         1-Utils.SMALL]
 */
public static/* @pure@ */double probToLogOdds(double prob) {
 if (gr(prob, 1) || (sm(prob, 0))) {
  throw new IllegalArgumentException("probToLogOdds: probability must "
   + "be in [0,1] " + prob);
 }
 double p = SMALL + (1.0 - 2 * SMALL) * prob;
 return Math.log(p / (1 - p));
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Subset description length: <br>
 * S(t,k,p) = -k*log2(p)-(n-k)log2(1-p)
 * 
 * Details see Quilan: "MDL and categorical theories (Continued)",ML95
 * 
 * @param t the number of elements in a known set
 * @param k the number of elements in a subset
 * @param p the expected proportion of subset known by recipient
 * @return the subset description length
 */
public static double subsetDL(double t, double k, double p) {
 double rt = Utils.gr(p, 0.0) ? (-k * Utils.log2(p)) : 0.0;
 rt -= (t - k) * Utils.log2(1 - p);
 return rt;
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Subset description length: <br>
 * S(t,k,p) = -k*log2(p)-(n-k)log2(1-p)
 * 
 * Details see Quilan: "MDL and categorical theories (Continued)",ML95
 * 
 * @param t the number of elements in a known set
 * @param k the number of elements in a subset
 * @param p the expected proportion of subset known by recipient
 * @return the subset description length
 */
public static double subsetDL(double t, double k, double p) {
 double rt = Utils.gr(p, 0.0) ? (-k * Utils.log2(p)) : 0.0;
 rt -= (t - k) * Utils.log2(1 - p);
 return rt;
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Prints label for subset index of instances (eg class).
 *
 * @exception Exception if something goes wrong
 */
public final String dumpLabel(int index,Instances data) throws Exception {
 StringBuffer text;
 text = new StringBuffer();
 text.append(((Instances)data).classAttribute().
   value(m_distribution.maxClass(index)));
 text.append(" ("+Utils.roundDouble(m_distribution.perBag(index),2));
 if (Utils.gr(m_distribution.numIncorrect(index),0))
  text.append("/"+Utils.roundDouble(m_distribution.numIncorrect(index),2));
 text.append(")");
 return text.toString();
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Prints label for subset index of instances (eg class).
 *
 * @exception Exception if something goes wrong
 */
public final String dumpLabel(int index,Instances data) throws Exception {
 StringBuffer text;
 text = new StringBuffer();
 text.append(((Instances)data).classAttribute().
   value(m_distribution.maxClass(index)));
 text.append(" ("+Utils.roundDouble(m_distribution.perBag(index),2));
 if (Utils.gr(m_distribution.numIncorrect(index),0))
  text.append("/"+Utils.roundDouble(m_distribution.numIncorrect(index),2));
 text.append(")");
 return text.toString();
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Help method for computing the split entropy.
 */
private final double splitEnt(Distribution bags, double totalnoInst) {
 double returnValue = 0;
 double noUnknown;
 int i;
 noUnknown = totalnoInst - bags.total();
 if (Utils.gr(bags.total(), 0)) {
  for (i = 0; i < bags.numBags(); i++) {
   returnValue = returnValue - lnFunc(bags.perBag(i));
  }
  returnValue = returnValue - lnFunc(noUnknown);
  returnValue = returnValue + lnFunc(totalnoInst);
 }
 return returnValue / ContingencyTables.log2;
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Help method for computing the split entropy.
 */
private final double splitEnt(Distribution bags, double totalnoInst) {
 double returnValue = 0;
 double noUnknown;
 int i;
 noUnknown = totalnoInst - bags.total();
 if (Utils.gr(bags.total(), 0)) {
  for (i = 0; i < bags.numBags(); i++) {
   returnValue = returnValue - lnFunc(bags.perBag(i));
  }
  returnValue = returnValue - lnFunc(noUnknown);
  returnValue = returnValue + lnFunc(totalnoInst);
 }
 return returnValue / ContingencyTables.log2;
}

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