Java

Class StdStats
Object
StdStats

public final class StdStats
extends Object
Standard statistics. This class provides methods for computing statistics such as min, max, mean, sample standard deviation, and sample variance.
For additional documentation, see Section 2.2 of Introduction to Programming in Java: AnInterdisciplinary Approach by Robert Sedgewick and Kevin Wayne.

Method Summary |
static void | main(String[] args)
          Test client. |
static double | max(double[] a)
          Return maximum value in array, -infinity if no such value. |
static double | max(double[] a, int lo, int hi)
          Return maximum value in subarray a[lo..hi], -infinity if no such value. |
static int |max(int[] a)
          Return maximum value of array, Integer.MIN_VALUE if no such value |
static double | mean(double[] a)
          Return average value in array, NaN if no such value. |
static double | mean(double[] a, int lo, int hi)
          Return average value in subarray a[lo..hi], NaN if no such value. |
static double | mean(int[] a)
          Return average value in array, NaNif no such value. |
static double | min(double[] a)
          Return minimum value in array, +infinity if no such value. |
static double | min(double[] a, int lo, int hi)
          Return minimum value in subarray a[lo..hi], +infinity if no such value. |
static int | min(int[] a)
          Return minimum value of array, Integer.MAX_VALUE if no such value |
static void |plotBars(double[] a)
          Plot bars from (0, a[i]) to (i, a[i]) to standard draw. |
static void | plotLines(double[] a)
          Plot line segments connecting points (i, a[i]) to standard draw. |
static void | plotPoints(double[] a)
          Plot points (i, a[i]) to standard draw. |
static double | stddev(double[] a)
          Return sample standard deviation of array, NaN if no suchvalue. |
static double | stddev(double[] a, int lo, int hi)
          Return sample standard deviation of subarray a[lo..hi], NaN if no such value. |
static double | stddev(int[] a)
          Return sample standard deviation of array, NaN if no such value. |
static double | stddevp(double[] a)
          Return population standard deviation of array, NaN if no such value. |static double | stddevp(double[] a, int lo, int hi)
          Return population standard deviation of subarray a[lo..hi], NaN if no such value. |
static double | sum(double[] a)
          Return sum of all values in array. |
static double | sum(double[] a, int lo, int hi)
          Return sum of all values in subarray a[lo..hi]. |
static int | sum(int[] a)
          Return sum of all values inarray. |
static double | var(double[] a)
          Return sample variance of array, NaN if no such value. |
static double | var(double[] a, int lo, int hi)
          Return sample variance of subarray a[lo..hi], NaN if no such value. |
static double | var(int[] a)
          Return sample variance of array, NaN if no such value. |
static double | varp(double[] a)
          Returnpopulation variance of array, NaN if no such value. |
static double | varp(double[] a, int lo, int hi)
          Return population variance of subarray a[lo..hi], NaN if no such value. |
 
Methods inherited from class Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
 
Method Detail |
max
public static doublemax(double[] a)
Return maximum value in array, -infinity if no such value.

max
public static double max(double[] a,
int lo,
int hi)
Return maximum value in subarray a[lo..hi], -infinity if no such value.

max
public static int max(int[] a)
Return maximum value of array,...