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https://issues.apache.org/jira/browse/MAHOUT-1638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14386079#comment-14386079
]
Andrew Palumbo commented on MAHOUT-1638:
----------------------------------------
Current status:
{code}
Map<String,Integer> map = m.getRowLabelBindings();
if (map != null) {
// label vector must be similarly partitioned like the Frame
byte []typeArr = {Vec.T_STR};
labels = frame.lastVec().makeCons(1, frame.numRows(), null , typeArr)[0];
Vec.Writer writer = labels.open();
Map<Integer,String> rmap = reverseMap(map);
for (int r = 0; r < m.rowSize(); r++){
writer.set(r, rmap.get(r).toString());
}
writer.close(closer);
}
{code}
When I run tests i can verify that
{code}
labels.isString() == true
labels.chunkForRow(r).getClass().getSimpleName() == "C0LChunk"
{code}
As far as I can tell, we need a {{CStrChunk}} or a {{NewChunk}} to be able to
set a String Value.
still getting the exception:
{code}
Not a String
java.lang.IllegalArgumentException: Not a String
at water.fvec.Chunk.set_impl(Chunk.java:494)
at water.fvec.Chunk.set(Chunk.java:456)
at water.fvec.Chunk.set_abs(Chunk.java:358)
at water.fvec.Vec$Writer.set(Vec.java:821)
{code}
> H2O bindings fail at drmParallelizeWithRowLabels(...)
> -----------------------------------------------------
>
> Key: MAHOUT-1638
> URL: https://issues.apache.org/jira/browse/MAHOUT-1638
> Project: Mahout
> Issue Type: Bug
> Affects Versions: 0.10.0
> Reporter: Andrew Palumbo
> Assignee: Andrew Palumbo
> Priority: Blocker
> Labels: DSL, h2o, scala
> Fix For: 0.10.0
>
>
> The H2OHelper.drmFromMatrix(...) function fails when trying to write row
> label String keys to a water.fvec.Vec.:
> {code:java}
> java.lang.IllegalArgumentException: Not a String
> at water.fvec.Chunk.set_impl(Chunk.java:507)
> at water.fvec.Chunk.set0(Chunk.java:469)
> at water.fvec.Chunk.set(Chunk.java:371)
> at water.fvec.Vec$Writer.set(Vec.java:803)
> at org.apache.mahout.h2obindings.H2OHelper.drmFromMatrix(H2OHelper.java:331)
> at
> org.apache.mahout.h2obindings.H2OEngine$.drmParallelizeWithRowLabels(H2OEngine.scala:83)
>
> at
> org.apache.mahout.math.drm.package$.drmParallelizeWithRowLabels(package.scala:67)
> {code}
> This causes an exception when calling drm.drmParallelizeWithRowLabels(...)
> To reproduce, apply [PR#72: Enable Naive Bayes Tests in h2o
> Module|https://github.com/apache/mahout/pull/72] and run:
> {code} $ mvn test
> {code}
> from the h2o module:
> {code:java}
> - NB Aggregator *** FAILED ***
> java.lang.IllegalArgumentException: Not a String
> at water.fvec.Chunk.set_impl(Chunk.java:507)
> at water.fvec.Chunk.set0(Chunk.java:469)
> at water.fvec.Chunk.set(Chunk.java:371)
> at water.fvec.Vec$Writer.set(Vec.java:803)
> at org.apache.mahout.h2obindings.H2OHelper.drmFromMatrix(H2OHelper.java:331)
> at
> org.apache.mahout.h2obindings.H2OEngine$.drmParallelizeWithRowLabels(H2OEngine.scala:83)
>
> at
> org.apache.mahout.math.drm.package$.drmParallelizeWithRowLabels(package.scala:67)
>
> at
> org.apache.mahout.classifier.naivebayes.NBTestBase$$anonfun$2.apply$mcV$sp(NBTestBase.scala:91)
>
> at
> org.apache.mahout.classifier.naivebayes.NBTestBase$$anonfun$2.apply(NBTestBase.scala:70)
>
> at
> org.apache.mahout.classifier.naivebayes.NBTestBase$$anonfun$2.apply(NBTestBase.scala:70)
>
> ...
> {code}
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