rxGetPartitions: Get Partitions of a Partitioned Xdf Data Source

發行項
07/12/2022

Description

Get partitions enumeration of a partitioned Xdf data source.

Usage

  rxGetPartitions(data)

Arguments

`data`

an existing partitioned data source object which was created by RxXdfData with createPartitionSet = TRUE and constructed by rxPartition.

Details

Value

Data frame with (n+1) columns, the first n columns are partitioning columns specified by varsToPartition in rxPartition and the (n+1)th column is a data source column where each row contains an Xdf data source object of one partition.

Author(s)

Microsoft Corporation Microsoft Technical Support

Examples


   # create an input Xdf data source
   inFile <- "claims.xdf"
   inFile <- file.path(dataPath = rxGetOption(opt = "sampleDataDir"), inFile)
   inXdfDS <- RxXdfData(file = inFile)

   # create an output partitioned Xdf data source
   outFile <- file.path(tempdir(), "partitionedClaims.xdf")
   outPartXdfDataSource <- RxXdfData(file = outFile, createPartitionSet = TRUE)

   # construct and save the partitioned Xdf to disk
   partDF <- rxPartition(inData = inXdfDS, outData = outPartXdfDataSource, varsToPartition = c("car.age"))

   # enumerate partitions
   partDF <- rxGetPartitions(outPartXdfDataSource)
   rxGetInfo(partDF, getVarInfo = TRUE)
   partDF$DataSource

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