隨機選擇我已經嘗試了很多方案,其中包括一個我們可以雷沃網站找到上XDF
xform <- function(data) {
data$.rxRowSelection <- as.logical(rbinom(nr, 1 , 0.5))
return(data)
}
rxDataStep(inData = "two_vars.xdf", outFile = "testSample",
transformFunc = xform , overwrite = TRUE)
時nr
是info$numRows
從rxGetInfo("two_vars.xdf")
rxDataStep(inData = "two_vars.xdf", outFile = "testSample",
rowSelection = as.logical(rbinom(nr, 1, 0.5)), overwrite = TRUE)
ERROR: The sample data set for the analysis has no variables. Error in doTryCatch(return(expr), name, parentenv, handler) : std::exception
感謝幫助!
什麼是'info $ numRows'? –
'info < - rxGetInfo(「two_vars.xdf」)' –