Add method "addToEntry" to the "RealVector" interface
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Key: MATH-685
URL: https://issues.apache.org/jira/browse/MATH-685
Project: Commons Math
Issue Type: Wish
Reporter: Gilles
Assignee: Gilles
Priority: Trivial
Fix For: 3.0
Method "addToEntry":
{code}
m.addToEntry(i, j, addend);
{code}
as a shortcut to:
{code}
m.setEntry(i, j, m.getEntry(i, j) + addend);
{code}
It has been argued (on the "dev" ML) that some functional style would be a
powerful and elegant way to implement a whole set of related functionality
("scale", "scaleAndAdd", etc.). However some simple things (like when the
"addend" depends on "i" and "j") cannot be achieved without writing many more
lines of code.
Method "addToEntry" exists in "RealMatrix". If and when some satisfactory
solution is found in order to remove it there, "RealVector" can always be
aligned with it.
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