rxMerge

정렬된 xdf파일(.xdf)이나 데이터프레임 형식의 파일을 하나 혹은 그 이상의 매치 변수를 사용하여 합치는 함수

Usage

rxMerge( inData1, inData2, outFile = NULL, matchVars = NULL, type = “inner”,
missingsLow = TRUE, autoSort = TRUE, duplicateVarExt = NULL,
varsToKeep1 = NULL, varsToDrop1 = NULL, newVarNames1 = NULL,
varsToKeep2 = NULL, varsToDrop2 = NULL, newVarNames2 = NULL,
rowsPerOutputBlock = -1, decreasing = FALSE, overwrite = FALSE,
maxRowsByCols = 3000000, bufferLimit = -1,
reportProgress = rxGetOption(“reportProgress”), verbose = 0,
xdfCompressionLevel = rxGetOption(“xdfCompressionLevel”), … )

rxMergeXdf( inFile1, inFile2, outFile, matchVars = NULL, type = “inner”,
missingsLow = TRUE, duplicateVarExt = NULL,
varsToKeep1 = NULL, varsToDrop1 = NULL, newVarNames1 = NULL,
varsToKeep2 = NULL, varsToDrop2 = NULL, newVarNames2 = NULL,
rowsPerOutputBlock = -1, decreasing = FALSE, overwrite = FALSE,
bufferLimit = -1, reportProgress = rxGetOption(“reportProgress”),
verbose = 0, xdfCompressionLevel = rxGetOption(“xdfCompressionLevel”), … )

Arguments

• inData1 :
• inFile1 :
• inData2 :
• inFile2 :
• outFile :
• matchVars :
• type :
• missingsLow :
• autoSort :
• duplicateVarExt :
• varsToKeep1 :
• varsToDrop1 :
• newVarNames1 :
• varsToKeep2 :
• varsToDrop2 :
• newVarNames2 :
• rowsPerOutputBlock :
• decreasing :
• overwrite : 같은 이름의 데이터를 불러왔을 때, 데이터 업그레이드(덮어쓰기 허용)
• maxRowsByCols : 불러오는 데이터의 최대 행의 수
• bufferLimit :
• reportProgress : 0-어떤프로세스도 report되지 않음/1-진행된 행의 숫자가 프린트되고 업데이트됨/2-진행된 행과 그 시간이 report됨/ 3-진행된 행과 전체 시간이 report됨
• verbose : 0-추가적인 output이 없음/ 1-(type=auto인경우) import type에 대한 정보가 프린트됨
• xdfCompressionLevel : integer in the range of -1 to 9. The higher the value, the greater the amount of compression - resulting in smaller files but a longer time to create them. If xdfCompressionLevel is set to 0, there will be no compression and files will be compatible with the 6.0 release of Revolution R Enterprise. If set to -1, a default level of compression will be used.

Sample Code

summary(cars)

##      speed           dist    
##  Min.   : 4.0   Min.   :  2  
##  1st Qu.:12.0   1st Qu.: 26  
##  Median :15.0   Median : 36  
##  Mean   :15.4   Mean   : 43  
##  3rd Qu.:19.0   3rd Qu.: 56  
##  Max.   :25.0   Max.   :120