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Added a static class to house useful math methods. All this has at the moment are methods for comparing doubles and floats, but I suggest that the bulk of our little math methods should be added here to avoid filling up Utils.java with so much random stuff. 

git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@505 348d0f76-0448-11de-a6fe-93d51630548a
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kiran 2009-04-23 17:45:19 +00:00
parent 3d7575bbb8
commit 77e1e9e2f1
1 changed files with 59 additions and 0 deletions
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59
java/src/org/broadinstitute/sting/utils/MathUtils.java 100755
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package org.broadinstitute.sting.utils;
/**
* MathUtils is a static class (no instantiation allowed!) with some useful math methods.
*
* @author Kiran Garimella
*/
public class MathUtils {
/** Private constructor. No instantiating this class! */
private MathUtils() {}
/**
* Compares double values for equality (within 1e-6), or inequality.
*
* @param a the first double value
* @param b the second double value
* @return -1 if a is greater than b, 0 if a is equal to be within 1e-6, 1 if b is greater than a.
*/
public static byte compareDoubles(double a, double b) { return compareDoubles(a, b, 1e-6); }
/**
* Compares double values for equality (within epsilon), or inequality.
*
* @param a the first double value
* @param b the second double value
* @param epsilon the precision within which two double values will be considered equal
* @return -1 if a is greater than b, 0 if a is equal to be within epsilon, 1 if b is greater than a.
*/
public static byte compareDoubles(double a, double b, double epsilon)
{
if (Math.abs(a - b) < epsilon) { return 0; }
if (a > b) { return -1; }
return 1;
}
/**
* Compares float values for equality (within 1e-6), or inequality.
*
* @param a the first float value
* @param b the second float value
* @return -1 if a is greater than b, 0 if a is equal to be within 1e-6, 1 if b is greater than a.
*/
public static byte compareFloats(float a, float b) { return compareFloats(a, b, 1e-6f); }
/**
* Compares float values for equality (within epsilon), or inequality.
*
* @param a the first float value
* @param b the second float value
* @param epsilon the precision within which two float values will be considered equal
* @return -1 if a is greater than b, 0 if a is equal to be within epsilon, 1 if b is greater than a.
*/
public static byte compareFloats(float a, float b, float epsilon)
{
if (Math.abs(a - b) < epsilon) { return 0; }
if (a > b) { return -1; }
return 1;
}
}