if you bail out into pure Spark out of algebraic DSL, yes. something like drmA.rdd.map(_._1).collect
On Fri, Sep 12, 2014 at 11:46 AM, Andrew Palumbo <[email protected]> wrote: > Ok thanks- All that I need is a Vector of the String keys of the Drm > (they contain the category labels that I need)- I think i was just going > the long (wrong) way to get them. Is there an easy way to extract these? > > > > Date: Fri, 12 Sep 2014 11:30:37 -0700 > > Subject: Re: drmFromHDFS rowLabelBindings question > > From: [email protected] > > To: [email protected] > > > > Actually, as it stands, collect doesn't support labels (either as keys or > > Named Vectors). > > > > There are 2 considerations: > > (1) I chose to ignore any use of NamedVectors in DRM since DRM already > has > > row keys, and two different sources have been creating ambiguity of > > interpretation, so i tailored all the algorithms on Spark to use keys > (not > > named vectors). > > > > (2) the reason why row keys are not translated to row bindings is because > > row keys are not necessarily strings, so translating them would require > > correct support of toString() transformation on any possible key. > > > > (3) I all drm collect cases i ever encountered, i never had any use for > > keys. > > > > Aside from (2) and (3) there's not much reason not to do it as described > in > > (2). > > > > -d > > > > > > On Fri, Sep 12, 2014 at 10:36 AM, Andrew Palumbo <[email protected]> > wrote: > > > > > I'm having some trouble getting the rowLabelBindings from a Sting-keyed > > > (Chekpointed...Spark)Drm from read in from HDFS. I'm reading in a > sequence > > > file of form <Text,VectorWritable> which is output from seq2sparse. > The > > > Drm has 7598 rows and the vectors seem to be read in properly. When I > try > > > to get a Map using getRowLabelBindings(), I get back a Map of size 1. > > > > > > The single key/value pair in that map is consistent with what I would > > > expect: > > > > > > k = /talk.religion.misc/84570, v = 7597 > > > > > > (the last row..) I don't know why I'm not getting entries for the > rest of > > > the rows. I've been looking through drmWrap() and drmFromHdfs() and > don't > > > see where/if rowLabelBindings is being set except in collect() (I'm > very > > > likely missing something because of my bad scala understanding). > > > > > > Is there a different way to get a map of key/rowIndex? > > > > > > Ultimately I'm working from the math-scala package, so I can't do > anything > > > specific with RDDs. > > > > > > Below is where I'm hitting trouble shown in the Spark-Shell. > > > > > > Any Input is appreciated. Thanks, > > > > > > Andy > > > > > > > > > mahout> val drmTFIDF= drmFromHDFS( path = > > > "/tmp/mahout-work-andy/20news-test-vectors/part-r-00000") > > > drmTFIDF: org.apache.mahout.math.drm.CheckpointedDrm[_] = > > > org.apache.mahout.sparkbindings.drm.CheckpointedDrmSpark@6e200e2d > > > > > > mahout> drmTFIDF.nrow > > > res0: Long = 7598 > > > > > > ^ > > > mahout> val drmRowLabelBindings:java.util.HashMap[String,Integer] = new > > > java.util.HashMap(drmTFIDF.getRowLabelBindings) > > > drmRowLabelBindings: java.util.HashMap[String,Integer] = > > > {/talk.religion.misc/84570=7597} > > > > > > mahout> val incoreTFIDF=drmTFIDF.collect > > > incoreTFIDF: org.apache.mahout.math.Matrix = > > > { > > > 2770 => > > > > {40894:3.706777572631836,25040:5.326602935791016,63527:7.625180244445801,30072:9.138689994812012,75991:2.7672300338745117,91042:1.964722752571106,85483:5.487469673156738,45764:4.326903343200684,83215:2.904540777206421,25284:4.734808444976807,90958:3.0112483501434326,29565:7.410068988800049,60779:6.3667192459106445,91156:1.6616008281707764,92814:2.255286693572998,23763:4.0394415855407715,7067:12.395035743713379,61058:6.993908405303955,55483:9.745443344116211,43286:3.622220039367676,65462:4.295836925506592,43535:1.5242335796356201,34898:6.624548435211182,66572:8.541470527648926,64323:2.1623659133911133,58008:3.128486394882202,33351:3.3363659381866455,36587:4.08017110824585,74747:2.935668706893921,38val > > > > > > mahout> val > > > > incoreRowLabelBindings:incoreRowLabelBindings:java.util.HashMap[String,Integer] > > > = new java.util.HashMap(incoreTFIDF.getRowLabelBindings) > > > incoreRowLabelBindings: java.util.HashMap[String,Integer] = > > > {/talk.religion.misc/84570=7597} > > > > > > mahout> incoreTFIDF.nrow > > > res1: Int = 7598 > > > > > > mahout> incoreRowLabelBindings.size > > > res3: Int = 1 > > > > > > mahout> drmTFIDF.nrow > > > res5: Long = 7598 > > > > > > mahout> drmRowLabelBindings.size > > > res4: Int = 1 > > > > >
