[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[asfgit]

Github user asfgit closed the pull request at:

https://github.com/apache/spark/pull/13301


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[srowen]

Github user srowen commented on the pull request:

https://github.com/apache/spark/pull/13301#issuecomment-84311
  
Merged to master/2.0


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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https://github.com/apache/spark/pull/13301#issuecomment-30386
  
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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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https://github.com/apache/spark/pull/13301#issuecomment-30238
  
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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[MLnick]

Github user MLnick commented on the pull request:

https://github.com/apache/spark/pull/13301#issuecomment-24371
  
LGTM pending tests


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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https://github.com/apache/spark/pull/13301#issuecomment-21171
  
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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[wangmiao1981]

Github user wangmiao1981 commented on the pull request:

https://github.com/apache/spark/pull/13301#issuecomment-20897
  
@MLnick Done. removed seed in python and java


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[wangmiao1981]

Github user wangmiao1981 commented on the pull request:

https://github.com/apache/spark/pull/13301#issuecomment-222040536
  
@MLnick I am on travel now. I will update it on Saturday. Thanks!


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[MLnick]

Github user MLnick commented on the pull request:

https://github.com/apache/spark/pull/13301#issuecomment-221825221
  
Minor comment otherwise LGTM


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[MLnick]

Github user MLnick commented on a diff in the pull request:

https://github.com/apache/spark/pull/13301#discussion_r64717582
  
--- Diff: 
examples/src/main/scala/org/apache/spark/examples/mllib/NaiveBayesExample.scala 
---
@@ -31,16 +30,11 @@ object NaiveBayesExample {
 val conf = new SparkConf().setAppName("NaiveBayesExample")
 val sc = new SparkContext(conf)
 // $example on$
-val data = sc.textFile("data/mllib/sample_naive_bayes_data.txt")
-val parsedData = data.map { line =>
-  val parts = line.split(',')
-  LabeledPoint(parts(0).toDouble, Vectors.dense(parts(1).split(' 
').map(_.toDouble)))
-}
+// Load and parse the data file.
+val data = MLUtils.loadLibSVMFile(sc, 
"data/mllib/sample_libsvm_data.txt")
 
 // Split data into training (60%) and test (40%).
-val splits = parsedData.randomSplit(Array(0.6, 0.4), seed = 11L)
-val training = splits(0)
-val test = splits(1)
+val Array(training, test) = data.randomSplit(Array(0.6, 0.4))
--- End diff --

I see you removed the `seed` here, which is not necessary but probably 
makes sense to simplify. In which case, perhaps remove the `seed` arg from the 
Java & Python examples. 


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[wangmiao1981]

Github user wangmiao1981 commented on the pull request:

https://github.com/apache/spark/pull/13301#issuecomment-221722166
  
@srowen I think we can delete it. Let me double check it and update this 
PR. Thanks!


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[wangmiao1981]

Github user wangmiao1981 commented on the pull request:

https://github.com/apache/spark/pull/13301#issuecomment-221722860
  
I grep all scala/java/py files and there is no reference to the data file.


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[srowen]

Github user srowen commented on the pull request:

https://github.com/apache/spark/pull/13301#issuecomment-221720899
  
OK got it. Now `sample_naive_bayes_data.txt` is no longer used, I think. I 
think it can be deleted?


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[wangmiao1981]

Github user wangmiao1981 commented on the pull request:

https://github.com/apache/spark/pull/13301#issuecomment-221706864
  
@srowen ML uses the sample_libsvm_data.txt in all three examples.
sample_naive_bayes_data.txt  is not in libsvm format. The format is shown 
below:

0,1 0 0
0,2 0 0
0,3 0 0
0,4 0 0
1,0 1 0
1,0 2 0
1,0 3 0
1,0 4 0
2,0 0 1
2,0 0 2
2,0 0 3
2,0 0 4




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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[srowen]

Github user srowen commented on a diff in the pull request:

https://github.com/apache/spark/pull/13301#discussion_r64652199
  
--- Diff: 
examples/src/main/scala/org/apache/spark/examples/mllib/NaiveBayesExample.scala 
---
@@ -31,21 +32,17 @@ object NaiveBayesExample {
 val conf = new SparkConf().setAppName("NaiveBayesExample")
 val sc = new SparkContext(conf)
 // $example on$
-val data = sc.textFile("data/mllib/sample_naive_bayes_data.txt")
-val parsedData = data.map { line =>
-  val parts = line.split(',')
-  LabeledPoint(parts(0).toDouble, Vectors.dense(parts(1).split(' 
').map(_.toDouble)))
-}
+// Load and parse the data file.
+val data = MLUtils.loadLibSVMFile(sc, 
"data/mllib/sample_libsvm_data.txt")
 
 // Split data into training (60%) and test (40%).
-val splits = parsedData.randomSplit(Array(0.6, 0.4), seed = 11L)
-val training = splits(0)
-val test = splits(1)
+val splits = data.randomSplit(Array(0.6, 0.4))
+val (trainingData, testData) = (splits(0), splits(1))
--- End diff --

Lets not change the variable names, since they were consistent.
But hey in Scala this can be `val Array(training, test) = 
data.randomSplit(...)`


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[srowen]

Github user srowen commented on the pull request:

https://github.com/apache/spark/pull/13301#issuecomment-221705531
  
Hm, I guess I don't see why this should use the libsvm sample? 2 of the 3 
examples used the naive bayes sample, and it's a naive bayes example. Shouldn't 
Java be fixed?


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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

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[GitHub] spark pull request: [SPARK-15449][MLlib][Example]:Wrong Data Forma...

[wangmiao1981]

GitHub user wangmiao1981 opened a pull request:

https://github.com/apache/spark/pull/13301

[SPARK-15449][MLlib][Example]:Wrong Data Format - Documentation Issue

## What changes were proposed in this pull request?

(Please fill in changes proposed in this fix)
In the MLLib naivebayes example, scala and python example doesn't use 
libsvm data, but Java does.

I make changes in scala and python example to use the libsvm data as the 
same as Java example.

## How was this patch tested?

Manual tests




You can merge this pull request into a Git repository by running:

$ git pull https://github.com/wangmiao1981/spark example

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/spark/pull/13301.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 #13301


commit fa3656e2aab980c0413357699d3774faf8372b0e
Author: wm...@hotmail.com 
Date:   2016-05-25T19:55:18Z

change data source for mllib naivebayes example




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