Github user myui commented on the issue:
https://github.com/apache/incubator-hivemall/pull/46
@wangyum Are you agree with the following new behavior of
[rescale(value,min,max)](https://en.wikipedia.org/wiki/Feature_scaling#Rescaling)?
```
-- new
select
Github user myui commented on the issue:
https://github.com/apache/incubator-hivemall/pull/46
Oops.. the latter one is expected.
```sql
select rescale(4.2,1.0,3.0),rescale(-0.3, 1.0, 3.0);
> 3.0 1.0
select rescale(4.2,1.0,3.0),rescale(-0.3, 1.0, 3.0);
>
GitHub user myui opened a pull request:
https://github.com/apache/incubator-hivemall/pull/46
[HIVEMALL-72] Fix rescale UDF behavior to return range [0.0,1.0]
## What changes were proposed in this pull request?
Fix rescale UDF behavior to return range `[0.0,1.0]`.
[
https://issues.apache.org/jira/browse/HIVEMALL-71?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Makoto Yui closed HIVEMALL-71.
--
Resolution: Fixed
Assignee: Makoto Yui
> Handle null values in RescaleUDF.java
>
Github user myui commented on the issue:
https://github.com/apache/incubator-hivemall/pull/45
@wangyum Thanks. Merged with some modifications.
```sql
select rescale(v,min,max) from (
select cast(1.2 as float) as v, 1.0 as min, 10.0 as max
union all
Github user myui commented on the issue:
https://github.com/apache/incubator-hivemall/pull/44
@wangyum Merged. Thank you for your contribution!
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Github user asfgit closed the pull request at:
https://github.com/apache/incubator-hivemall/pull/44
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