getDateOrigin | R Documentation |
Return the date origin used internally by an xlsx or xlsm file
getDateOrigin(xlsxFile)
xlsxFile |
An xlsx or xlsm file. |
Excel stores dates as the number of days from either 1904-01-01 or 1900-01-01. This function
checks the date origin being used in an Excel file and returns is so it can be used in convertToDate()
One of "1900-01-01" or "1904-01-01".
Alexander Walker
convertToDate()
## create a file with some dates ## Not run: write.xlsx(as.Date("2015-01-10") - (0:4), file = "getDateOriginExample.xlsx") m <- read.xlsx("getDateOriginExample.xlsx") ## convert to dates do <- getDateOrigin(system.file("extdata", "readTest.xlsx", package = "openxlsx")) convertToDate(m[[1]], do) ## End(Not run)
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