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RxXdfData-class: Class RxXdfData

  • [アーティクル]

Description

Xdf data source connection class.

Generators

The targeted generator RxXdfData as well as the general generator rxNewDataSource.

Extends

Class RxFileData, directly. Class RxDataSource, by class RxFileData.

Methods

colnames

signature(x = "RxXdfData"): ...

dim

signature(x = "RxXdfData"): ...

dimnames

signature(x = "RxXdfData"): ...

formula

signature(x = "RxXdfData"): ...

length

signature(x = "RxXdfData"): ...

names

signature(x = "RxXdfData"): ...

names<-

signature(x = "RxXdfData"): ...

row.names

signature(x = "RxXdfData"): ...

show

signature(object = "RxXdfData"): ...

str

signature(object = "RxXdfData"): ...

Author(s)

Microsoft Corporation Microsoft Technical Support

See Also

RxDataSource-class, RxXdfData, rxNewDataSource

Examples


 DS <- RxXdfData(file.path(rxGetOption("sampleDataDir"), "fourthgraders.xdf"))
 head(DS)
 tail(DS)
 names(DS)
 dim(DS)
 dimnames(DS)
 nrow(DS)
 ncol(DS)
 str(DS)

 # formula examples
 formula(DS)
 formula(DS, varsToDrop = "male")
 formula(DS, depVar = "height")
 formula(DS, depVar = "height", inter = list(c("male", "eyecolor")))

 # summarize variables in data source
 summary(DS)

 # renaming variables in .xdf file via replacement method
 XDF <- file.path(tempdir(), "iris.xdf")
 rxDataStep(iris, XDF, overwrite = TRUE)
 irisDS <- RxXdfData(XDF)
 names(irisDS)
 names(irisDS) <- c("cow","horse","chicken","goat","squirrel")
 names(irisDS)
 if (file.exists(XDF)) file.remove(XDF)