Sébastien Brisard created MATH-875:
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Summary: Deprecate RealVector.sparseIterator() and
FieldVector.sparseIterator()
Key: MATH-875
URL: https://issues.apache.org/jira/browse/MATH-875
Project: Commons Math
Issue Type: Improvement
Affects Versions: 3.1, 4.0
Reporter: Sébastien Brisard
Priority: Minor
Following MATH-870, {{RealVector.sparseIterator()}} and
{{FieldVector.sparseIterator()}} have become useless. Their interface was
confusing. Indeed, the Javadoc states
{quote}
Specialized implementations may choose to not iterate over all dimensions,
either because those values are unset, or are equal to defaultValue(), or are
small enough to be ignored for the purposes of iteration.
{quote}
The reference to {{defaultValue()}} (which does *not* exist) suggests that the
interface offers the flexibility to chose the value which is not stored in the
sparse implementation. On the other hand, "small enough to be ignored" suggests
that this default value is zero.
In version 3.1, this method will be deprecated, to be removed in 4.0.
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