Venkatesha Murthy TS created MATH-1132:
------------------------------------------
Summary: NaN transformation based on NaNStrategy
Key: MATH-1132
URL: https://issues.apache.org/jira/browse/MATH-1132
Project: Commons Math
Issue Type: Improvement
Affects Versions: 3.3
Reporter: Venkatesha Murthy TS
Fix For: 3.4
The NaNs in a double array may need to be transformed to either +/- Infinity or
removed before processing them(say such as in percentile).
So basically from documenting angle; we will need to action as follows:
Whenever a double quantity is a NaN (say in an array); based on the
NanStrategy; it needs to be treated as follows before processing:
a) MAXIMAL -> replace with +infinity
b) MINIMAL -> replace with -Inifinity
c) REMOVED -> just remove it
d) FIXED -> Leave it as it is
e) FAILED -> throw a NaN exception
Can this documentation be specifically added to NaNStrategy and perhaps a
substitution value also can be added to enforce the documentation.
In addition i will also submit a patch for a simple NaNTransformer
implementation.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
