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Posted to issues@commons.apache.org by "Gilles (JIRA)" <ji...@apache.org> on 2012/11/27 17:29:58 UTC
[jira] [Created] (MATH-910) "ebe..." basic operations in
"MathArrays"
Gilles created MATH-910:
---------------------------
Summary: "ebe..." basic operations in "MathArrays"
Key: MATH-910
URL: https://issues.apache.org/jira/browse/MATH-910
Project: Commons Math
Issue Type: New Feature
Reporter: Gilles
Assignee: Gilles
Priority: Trivial
Fix For: 3.1
I propose to add element-by-element addition, subtraction, division and multiplication in the "MathArrays" class. E.g. "ebeDivide" would be defined as:
{code}
/**
* Creates an array whose contents will be the element-by-element
* division of the first argument by the second.
*
* @param numer Numerator of the division.
* @param denom Denominator of the division.
* @return a new array {@code r} where {@code r[i] = numer[i] / denom[i]}.
* @throws DimensionMismatchException if the array lengths differ.
*/
public static double[] ebeDivide(double[] numer,
double[] denom) {
if (numer.length != denom.length) {
throw new DimensionMismatchException(numer.length, denom.length);
}
final double[] result = numer.clone();
for (int i = 0; i < numer.length; i++) {
result[i] /= denom[i];
}
return result;
}
{code}
This would allow to resolve MATH-895 without settling the discussion on how the API of {{RealVector}} should change.
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[jira] [Resolved] (MATH-910) "ebe..." basic operations in
"MathArrays"
Posted by "Gilles (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MATH-910?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gilles resolved MATH-910.
-------------------------
Resolution: Fixed
Committed in revision 1414435.
> "ebe..." basic operations in "MathArrays"
> -----------------------------------------
>
> Key: MATH-910
> URL: https://issues.apache.org/jira/browse/MATH-910
> Project: Commons Math
> Issue Type: New Feature
> Reporter: Gilles
> Assignee: Gilles
> Priority: Trivial
> Fix For: 3.1
>
>
> I propose to add element-by-element addition, subtraction, division and multiplication in the "MathArrays" class. E.g. "ebeDivide" would be defined as:
> {code}
> /**
> * Creates an array whose contents will be the element-by-element
> * division of the first argument by the second.
> *
> * @param numer Numerator of the division.
> * @param denom Denominator of the division.
> * @return a new array {@code r} where {@code r[i] = numer[i] / denom[i]}.
> * @throws DimensionMismatchException if the array lengths differ.
> */
> public static double[] ebeDivide(double[] numer,
> double[] denom) {
> if (numer.length != denom.length) {
> throw new DimensionMismatchException(numer.length, denom.length);
> }
> final double[] result = numer.clone();
> for (int i = 0; i < numer.length; i++) {
> result[i] /= denom[i];
> }
> return result;
> }
> {code}
> This would allow to resolve MATH-895 without settling the discussion on how the API of {{RealVector}} should change.
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