RxDataSource: RevoScaleR Data Source: Class Generator

Статья
07/15/2019

Description

A generator for RxDataSource S4 classes.

Usage

    RxDataSource( class = NULL, dataSource = NULL,  ...)

Arguments

`class`

an optional character string specifying class name of the data source to be created, such as RxTextData, RxSpssData, RxSasData, RxOdbcData, or RxTeradata. If the class of the input dataSource differs from class, contents of overlapping slots will be copied from the input data source to the newly constructed data source.

`dataSource`

an optional data source object to be cloned.

`...`

any other arguments to be applied to the newly constructed data source.

Details

If class is specified, the returned object will be of that class. If not, the returned object will have the class of dataSource. If both class and dataSource are specified, the contents of matching slots will be copied from the input dataSource to the output object. Additional arguments will then be applied.

Value

A type of RxDataSource data source object.

Author(s)

Microsoft Corporation Microsoft Technical Support

Examples



   claimsSpssName <- file.path(rxGetOption("sampleDataDir"), "claims.sav")
   claimsTextName <- file.path(rxGetOption("sampleDataDir"), "claims.txt")
   claimsColInfo <- list( 
       age = list(type = "factor", 
           levels = c("17-20", "21-24", "25-29", "30-34", "35-39", "40-49", "50-59", "60+")), 
           car.age = list(type = "factor", levels = c("0-3", "4-7", "8-9", "10+")), 
           type = list(type = "factor", levels = c("A", "B", "C", "D")) 
       ) 
   textDS <- RxTextData(file = claimsTextName, colInfo = claimsColInfo)

   # Create an SPSS data source from the text data source
   # The 'colInfo' will be carried over to the SPSS data source
   # and the file name will be replaced
   spssDS <- RxDataSource(class = "RxSpssData", dataSource = textDS, file = claimsSpssName)

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