[
https://issues.apache.org/jira/browse/SPARK-18569?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dongjoon Hyun updated SPARK-18569:
----------------------------------
Affects Version/s: (was: 3.0.0)
3.1.0
> Support R formula arithmetic
> -----------------------------
>
> Key: SPARK-18569
> URL: https://issues.apache.org/jira/browse/SPARK-18569
> Project: Spark
> Issue Type: Improvement
> Components: ML, SparkR
> Affects Versions: 3.1.0
> Reporter: Felix Cheung
> Priority: Major
>
> I think we should support arithmetic which makes it a lot more convenient to
> build model. Something like
> {code}
> log(y) ~ a + log(x)
> {code}
> And to avoid resolution confusions we should support the I() operator:
> {code}
> I
> I(X∗Z) as is: include a new variable consisting of these variables multiplied
> {code}
> Such that this works:
> {code}
> y ~ a + I(b+c)
> {code}
> the term b+c is to be interpreted as the sum of b and c.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
