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Posted to issues@spark.apache.org by "Joseph K. Bradley (JIRA)" <ji...@apache.org> on 2016/12/01 22:36:58 UTC
[jira] [Updated] (SPARK-18291) SparkR glm predict should output
original label when family = "binomial"
[ https://issues.apache.org/jira/browse/SPARK-18291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Joseph K. Bradley updated SPARK-18291:
--------------------------------------
Attachment: SparkR2.1decisionoutputschemaforGLMs.pdf
I'm adding a little summary of the API issue. [~yanboliang] [~felixcheung] [~shivaram] [~mengxr] what do you think?
I'd vote for Option 3 to avoid breaking APIs. Given a re-do of SparkR, I'd choose Option 2.
> SparkR glm predict should output original label when family = "binomial"
> ------------------------------------------------------------------------
>
> Key: SPARK-18291
> URL: https://issues.apache.org/jira/browse/SPARK-18291
> Project: Spark
> Issue Type: Bug
> Components: ML, SparkR
> Reporter: Yanbo Liang
> Assignee: Yanbo Liang
> Fix For: 2.1.0
>
> Attachments: SparkR2.1decisionoutputschemaforGLMs.pdf
>
>
> SparkR spark.glm predict should output original label when family = "binomial".
> For example, we can run the following code in sparkr shell:
> {code}
> training <- suppressWarnings(createDataFrame(iris))
> training <- training[training$Species %in% c("versicolor", "virginica"), ]
> model <- spark.glm(training, Species ~ Sepal_Length + Sepal_Width,family = binomial(link = "logit"))
> showDF(predict(model, training))
> {code}
> The prediction column is double value which makes no sense to users.
> {code}
> +------------+-----------+------------+-----------+----------+-----+-------------------+
> |Sepal_Length|Sepal_Width|Petal_Length|Petal_Width| Species|label| prediction|
> +------------+-----------+------------+-----------+----------+-----+-------------------+
> | 7.0| 3.2| 4.7| 1.4|versicolor| 0.0| 0.8271421517601544|
> | 6.4| 3.2| 4.5| 1.5|versicolor| 0.0| 0.6044595910413112|
> | 6.9| 3.1| 4.9| 1.5|versicolor| 0.0| 0.7916340858281998|
> | 5.5| 2.3| 4.0| 1.3|versicolor| 0.0|0.16080518180591158|
> | 6.5| 2.8| 4.6| 1.5|versicolor| 0.0| 0.6112229217050189|
> | 5.7| 2.8| 4.5| 1.3|versicolor| 0.0| 0.2555087295500885|
> | 6.3| 3.3| 4.7| 1.6|versicolor| 0.0| 0.5681507664364834|
> | 4.9| 2.4| 3.3| 1.0|versicolor| 0.0|0.05990570219972002|
> | 6.6| 2.9| 4.6| 1.3|versicolor| 0.0| 0.6644434078306246|
> | 5.2| 2.7| 3.9| 1.4|versicolor| 0.0|0.11293577405862379|
> | 5.0| 2.0| 3.5| 1.0|versicolor| 0.0|0.06152372321585971|
> | 5.9| 3.0| 4.2| 1.5|versicolor| 0.0|0.35250697207602555|
> | 6.0| 2.2| 4.0| 1.0|versicolor| 0.0|0.32267018290814303|
> | 6.1| 2.9| 4.7| 1.4|versicolor| 0.0| 0.433391153814592|
> | 5.6| 2.9| 3.6| 1.3|versicolor| 0.0| 0.2280744262436993|
> | 6.7| 3.1| 4.4| 1.4|versicolor| 0.0| 0.7219848389339459|
> | 5.6| 3.0| 4.5| 1.5|versicolor| 0.0|0.23527698971404695|
> | 5.8| 2.7| 4.1| 1.0|versicolor| 0.0| 0.285024533520016|
> | 6.2| 2.2| 4.5| 1.5|versicolor| 0.0| 0.4107047877447493|
> | 5.6| 2.5| 3.9| 1.1|versicolor| 0.0|0.20083561961645083|
> +------------+-----------+------------+-----------+----------+-----+-------------------+
> {code}
> The prediction value should be the original label like:
> {code}
> +------------+-----------+------------+-----------+----------+-----+----------+
> |Sepal_Length|Sepal_Width|Petal_Length|Petal_Width| Species|label|prediction|
> +------------+-----------+------------+-----------+----------+-----+----------+
> | 7.0| 3.2| 4.7| 1.4|versicolor| 0.0| virginica|
> | 6.4| 3.2| 4.5| 1.5|versicolor| 0.0| virginica|
> | 6.9| 3.1| 4.9| 1.5|versicolor| 0.0| virginica|
> | 5.5| 2.3| 4.0| 1.3|versicolor| 0.0|versicolor|
> | 6.5| 2.8| 4.6| 1.5|versicolor| 0.0| virginica|
> | 5.7| 2.8| 4.5| 1.3|versicolor| 0.0|versicolor|
> | 6.3| 3.3| 4.7| 1.6|versicolor| 0.0| virginica|
> | 4.9| 2.4| 3.3| 1.0|versicolor| 0.0|versicolor|
> | 6.6| 2.9| 4.6| 1.3|versicolor| 0.0| virginica|
> | 5.2| 2.7| 3.9| 1.4|versicolor| 0.0|versicolor|
> | 5.0| 2.0| 3.5| 1.0|versicolor| 0.0|versicolor|
> | 5.9| 3.0| 4.2| 1.5|versicolor| 0.0|versicolor|
> | 6.0| 2.2| 4.0| 1.0|versicolor| 0.0|versicolor|
> | 6.1| 2.9| 4.7| 1.4|versicolor| 0.0|versicolor|
> | 5.6| 2.9| 3.6| 1.3|versicolor| 0.0|versicolor|
> | 6.7| 3.1| 4.4| 1.4|versicolor| 0.0| virginica|
> | 5.6| 3.0| 4.5| 1.5|versicolor| 0.0|versicolor|
> | 5.8| 2.7| 4.1| 1.0|versicolor| 0.0|versicolor|
> | 6.2| 2.2| 4.5| 1.5|versicolor| 0.0|versicolor|
> | 5.6| 2.5| 3.9| 1.1|versicolor| 0.0|versicolor|
> +------------+-----------+------------+-----------+----------+-----+----------+
> {code}
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