net.sf.saxon.exslt
Class Math

java.lang.Object
  extended by net.sf.saxon.exslt.Math

public abstract class Math
extends Object

This class implements extension functions in the http://exslt.org/math namespace.


Constructor Summary
Math()
           
 
Method Summary
static double abs(double x)
          Get the absolute value of a numeric value (SStL)
static double acos(double x)
          Get the arccosine of a numeric value (SStL)
static double asin(double x)
          Get the arcsine of a numeric value (SStL)
static double atan(double x)
          Get the arctangent of a numeric value (SStL)
static double atan2(double x, double y)
          Converts rectangular coordinates to polar (SStL)
static double constant(XPathContext context, String name, double precision)
          Get a named constant to a given precision (SStL)
static double cos(double x)
          Get the cosine of a numeric value (SStL)
static double exp(double x)
          Get the exponential of a numeric value (SStL)
static Value highest(SequenceIterator nsv)
          Get the items with maximum numeric value of the string-value of each of a sequence of items.
static double log(double x)
          Get the logarithm of a numeric value (SStL)
static Value lowest(SequenceIterator nsv)
          Get the items with minimum numeric value of the string-value of each of a sequence of items The items are returned in the order of the original sequence.
static double max(SequenceIterator nsv)
          Get the maximum numeric value of the string-value of each of a set of nodes
static double min(SequenceIterator nsv)
          Get the minimum numeric value of the string-value of each of a set of nodes
static NumericValue power(NumericValue n, NumericValue e)
          Get a number n raised to the power of another number e.
static double random()
          Get a random numeric value (SStL)
static double sin(double x)
          Get the sine of a numeric value (SStL)
static double sqrt(double x)
          Get the square root of a numeric value (SStL)
static double tan(double x)
          Get the tangent of a numeric value (SStL)
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Math

public Math()
Method Detail

max

public static double max(SequenceIterator nsv)
                  throws XPathException
Get the maximum numeric value of the string-value of each of a set of nodes

Throws:
XPathException

min

public static double min(SequenceIterator nsv)
                  throws XPathException
Get the minimum numeric value of the string-value of each of a set of nodes

Throws:
XPathException

highest

public static Value highest(SequenceIterator nsv)
                     throws XPathException
Get the items with maximum numeric value of the string-value of each of a sequence of items. The items are returned in the order of the original sequence.

Throws:
XPathException

lowest

public static Value lowest(SequenceIterator nsv)
                    throws XPathException
Get the items with minimum numeric value of the string-value of each of a sequence of items The items are returned in the order of the original sequence.

Throws:
XPathException

abs

public static double abs(double x)
Get the absolute value of a numeric value (SStL)


sqrt

public static double sqrt(double x)
Get the square root of a numeric value (SStL)


power

public static NumericValue power(NumericValue n,
                                 NumericValue e)
                          throws XPathException
Get a number n raised to the power of another number e.

If e is a non-negative integer, then the result will have the same type as n, except that a float is always promoted to double.

If e is a negative integer, then the result will have the same type as n except that a float is treated as a double and an integer is treated as a decimal.

If e is not an integer (or an xs:decimal representing an integer), the result will be a double.

Parameters:
n - the first argument.
e - the second argument. M
Returns:
the result of n^e
Throws:
XPathException - if an arithmetic overflow is detected. However, there is no guarantee that overflow will always be detected, it may (especially with double arithmetic) lead to wrong answers being returned.

constant

public static double constant(XPathContext context,
                              String name,
                              double precision)
                       throws XPathException
Get a named constant to a given precision (SStL)

Throws:
XPathException

log

public static double log(double x)
Get the logarithm of a numeric value (SStL)


random

public static double random()
Get a random numeric value (SStL)


sin

public static double sin(double x)
Get the sine of a numeric value (SStL)


cos

public static double cos(double x)
Get the cosine of a numeric value (SStL)


tan

public static double tan(double x)
Get the tangent of a numeric value (SStL)


asin

public static double asin(double x)
Get the arcsine of a numeric value (SStL)


acos

public static double acos(double x)
Get the arccosine of a numeric value (SStL)


atan

public static double atan(double x)
Get the arctangent of a numeric value (SStL)


atan2

public static double atan2(double x,
                           double y)
Converts rectangular coordinates to polar (SStL)


exp

public static double exp(double x)
Get the exponential of a numeric value (SStL)



Copyright (C) Michael H. Kay. All rights reserved.