Installing of SparkR
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IhavethelastversionofR-3.2.1.NowIwanttoinstallSparkRonR.AfterIexecute: >install.packages("SparkR") Igotback: Instal......
java.io.IOException: Could not locate executable n
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: I'mnotabletorunasimplesparkjobinScalaIDE(Mavensparkproject)installedonWindows7 Sparkcoredependencyhasbeenadded. val......
Renaming column names of a DataFrame in Spark Scal
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Iamtryingtoconvertalltheheaders/columnnamesofaDataFrameinSpark-Scala.asofnowIcomeupwithfollowingcodewhichonlyrepl......
How to zip two (or more) DataFrame in Spark
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IhavetwoDataFrameaandb. aislike Column1|Column2 abc|123 cde|23 bislike Column1 1 2 Iwan......
Use collect_list and collect_set in Spark SQL
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Accordingtothedocs,thecollect_setandcollect_listfunctionsshouldbeavailableinSparkSQL.However,Icannotgetittowork.I'mrun......
Pyspark filter dataframe by columns of another dat
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: NotsurewhyI'mhavingadifficulttimewiththis,itseemssosimpleconsideringit'sfairlyeasytodoinRorpandas.Iwantedtoavoid......
Defining a UDF that accepts an Array of objects in
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: WhenworkingwithSpark'sDataFrames,UserDefinedFunctions(UDFs)arerequiredformappingdataincolumns.UDFsrequirethatargumenttype......
Save ML model for future usage
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IwasapplyingsomeMachineLearningalgorithmslikeLinearRegression,LogisticRegression,andNaiveBayestosomedata,butIwastryingt......
Best Practice to launch Spark Applications via Web
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IwanttoexposemySparkapplicationstotheuserswithawebapplication. Basically,theusercandecidewhichactionhewantstorunand......
How to Define Custom partitioner for Spark RDDs of
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IamnewtoSpark.Ihavealargedatasetofelements[RDD]andIwanttodivideitintotwoexactlyequalsizedpartitionsmaintainingorder......
How to create an empty DataFrame with a specified
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IwanttocreateonDataFramewithaspecifiedschemainScala.IhavetriedtouseJSONread(Imeanreadingemptyfile)butIdon'tthinkt......
Overwrite specific partitions in spark dataframe w
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Iwanttooverwritespecificpartitionsinsteadofallinspark.Iamtryingthefollowingcommand: df.write.orc('maprfs:///hdfs-base-path',......
Apache Spark Moving Average
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IhaveahugefileinHDFShavingTimeSeriesdatapoints(YahooStockprices). IwanttofindthemovingaverageoftheTimeSerieshowdo......
Spark: what's the best strategy for joining a
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IhavetwoRDD'sthatIwanttojoinandtheylooklikethis: valrdd1:RDD[(T,U)] valrdd2:RDD[((T,W),V)] Ithappenstobethecasethat......
How to set up Spark on Windows?
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IamtryingtosetupApacheSparkonWindows. Aftersearchingabit,IunderstandthatthestandalonemodeiswhatIwant. Whichbinariesdo......
Requirements for converting Spark dataframe to Pan
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: I'mrunningSparkonHadoop'sYARN.Howdoesthisconversionwork?Doesacollect()takeplacebeforetheconversion? AlsoIneedtoinsta......
Spark Scala: How to convert Dataframe[vector] to D
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IjustusedStandardScalertonormalizemyfeaturesforaMLapplication.Afterselectingthescaledfeatures,Iwanttoconvertthisbackt......
Spark losing println() on stdout
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Ihavethefollowingcode: valblueCount=sc.accumulator[Long](0) valoutput=input.map{data=> for(value<-data.getValues()){ ......
Explode (transpose?) multiple columns in Spark SQL
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IamusingSparkSQL(ImentionthatitisinSparkincasethataffectstheSQLsyntax-I'mnotfamiliarenoughtobesureyet)andIhave......
Is groupByKey ever preferred over reduceByKey
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IalwaysusereduceByKeywhenIneedtogroupdatainRDDs,becauseitperformsamapsidereducebeforeshufflingdata,whichoftenmeansth......
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