[jira] [Comment Edited] (SPARK-14479) GLM supports output link prediction

["Yanbo Liang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-14479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15234124#comment-15234124 ] 

Yanbo Liang edited comment on SPARK-14479 at 4/10/16 1:59 PM:
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Had offline discussion with [~mengxr], we all agreed [~josephkb]'s proposal. We can output 2 prediction columns: "predictionCol"(default) and "linkPredictionCol" which corresponding to "response" and "link" type of R predict.glm output. 
I converted this task to "Improvement" and sent a PR for supporting link prediction.


was (Author: yanboliang):
Had offline discussion with [~mengxr], we can output 2 prediction columns: "predictionCol"(default) and "linkPredictionCol" which corresponding to "response" and "link" type of R predict.glm output. 
I converted this task to "Improvement" and sent a PR for supporting link prediction.

> GLM supports output link prediction
> -----------------------------------
>
>                 Key: SPARK-14479
>                 URL: https://issues.apache.org/jira/browse/SPARK-14479
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML, SparkR
>            Reporter: Yanbo Liang
>
> In R glm and glmnet, the default type of predict is "link" which is the linear predictor, users can specify "type = response" to output response prediction. Currently the ML glm predict will output "response" prediction by default, I think it's more reasonable. Should we change the default type of ML glm predict output? 
> R glm: https://stat.ethz.ch/R-manual/R-devel/library/stats/html/predict.glm.html
> R glmnet: http://www.inside-r.org/packages/cran/glmnet/docs/predict.glmnet
> Meanwhile, we should decide the default type of glm predict output in SparkR.



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