[
https://issues.apache.org/jira/browse/SPARK-5099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Liang-Chi Hsieh updated SPARK-5099:
-----------------------------------
Description:
This is a minor pr where I think that we can simply take minus of margin,
instead of subtracting margin, in the LogisticGradient.
Mathematically, they are equal. But the modified equation is the common form of
logistic loss function and so more readable. It also computes more accurate
value as some quick tests show.
was:
This is a minor pr where I think that we can simply take minus of margin,
instead of subtracting margin, in the LogisticGradient.
Mathematically, they are equal. But the modified equation is the common form of
logistic loss function and so more readable. It also computes more accurate
value as some quick tests show.
Besides, there is a bug in computing the loss in LogLoss. This pr fixes it too.
> Simplify logistic loss function
> -------------------------------
>
> Key: SPARK-5099
> URL: https://issues.apache.org/jira/browse/SPARK-5099
> Project: Spark
> Issue Type: Improvement
> Reporter: Liang-Chi Hsieh
> Priority: Minor
>
> This is a minor pr where I think that we can simply take minus of margin,
> instead of subtracting margin, in the LogisticGradient.
> Mathematically, they are equal. But the modified equation is the common form
> of logistic loss function and so more readable. It also computes more
> accurate value as some quick tests show.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
