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]`.
## What type of PR is it?
Bug Fix
## What is the Jira issue?
https://issues.apache.org/jira/browse/HIVEMALL-72
## How was this patch tested?
manual tests
```sql
-- Before
select rescale(4.2,1.0,3.0),rescale(-0.3, 1.0, 3.0);
> 1.5999999 -0.65
-- After
select rescale(4.2,1.0,3.0),rescale(-0.3, 1.0, 3.0);
> 3.0 1.0
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/myui/incubator-hivemall HIVEMALL-72
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-hivemall/pull/46.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #46
----
commit 6510edd3930d061272e702b5a6b7fc97b7ce3e52
Author: myui <[email protected]>
Date: 2017-02-16T06:39:36Z
[HIVEMALL-72] Fix rescale UDF behavior to return range [0.0,1.0]
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