Java Doc for Statistics.java in  » Parser » Rats-Parser-Generators » xtc » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Parser » Rats Parser Generators » xtc.util   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    xtc.util.Statistics Statistics public class Statistics (Code) Implementation of a simple statistics collector. author:    Robert Grimm version:    $Revision: 1.13 $ Constructor Summary public   Statistics()      Create a new statistics collector. Method Summary public  void add(double d)      Add the specified number. public static  double fitSlope(Statistics x, Statistics y)      Compute the least squares fit. public  double get(int idx)      Get the specified number. Parameters:   idx - The index. public  double mean()      Calculate the mean. public  double median()      Calculate the median. public  void reset()      Reset this statistics collector. public static  double round(double d)      Round the specified number to two digits after the decimal point. Parameters:   d - The number. public  int size()      Get the size of this collection. public  double stdev()      Calculate the standard deviation. public  double sum()      Calculate the sum. Constructor Detail Statistics public Statistics()(Code) Create a new statistics collector. Method Detail add public void add(double d)(Code) Add the specified number. Parameters:   d - The number. fitSlope public static double fitSlope(Statistics x, Statistics y)(Code) Compute the least squares fit. This method computes the least squares fit to a straight line model without a constant term for the specified collections of numbers: y = mx. Parameters:   x - The collection of x coordinates. Parameters:   y - The collection of y coordiantes. The slope of the corresponding line model. throws:   IllegalArgumentException - Signals that the two collectionsare empty or not of the same size. get public double get(int idx)(Code) Get the specified number. Parameters:   idx - The index. The corresponding number. throws:   IndexOutOfBoundsException - Signals that the index is out of range. mean public double mean()(Code) Calculate the mean. The mean. median public double median()(Code) Calculate the median. Note that this method does not change the order of numbers in this collection, i.e. it sorts a copy. The median. reset public void reset()(Code) Reset this statistics collector. round public static double round(double d)(Code) Round the specified number to two digits after the decimal point. Parameters:   d - The number. The rounded number. size public int size()(Code) Get the size of this collection. The size. stdev public double stdev()(Code) Calculate the standard deviation. The standard deviation. sum public double sum()(Code) Calculate the sum. The sum. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)