Not sure this is what you need or the best way to do it, but you could
do something along these lines:
#first create a file name that depends on which file names already
exist. The big thing here is list.files() but you probably need to adapt
the rest to your needs:
fileNumber <- list.files(pattern="xxx")
fileName <- paste0("xxx", length(fileNumber)+1 , ".xlsx")
#then write to xlsx in a loop:
for(i in ...){
write.xlsx2(df_all2[[i]], file=fileName, sheetName=i, append=TRUE)
}
This works at least with xlsx::write.xlsx2(), with no error or warning
even for when the file does not exist (first iteration)
HTH,
Ivan
--
Ivan Calandra, PhD
Scientific Mediator
University of Reims Champagne-Ardenne
GEGENAA - EA 3795
CREA - 2 esplanade Roland Garros
51100 Reims, France
+33(0)3 26 77 36 89
ivan.calan...@univ-reims.fr
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Le 03/05/2016 à 05:21, jpm miao a écrit :
Hi,
I am trying to print several dataset in several different sheets of the
same xlsx file.
I sometimes run the codes more than once, and I need to erase all things in
the target file, and I do not use "append" in the first function call.
However I want to write it in a loop. Is there a way to initiate a blank
xlsx file so that I can use "append = TRUE" whenever I call the function
write.xlsx2?
output_file2<-"data_xx.xlsx"
write.xlsx2(x= df_all2[["a"]], file = output_file2, sheetName = "a")
write.xlsx2(x= df_all2[["b"]], file = output_file2, sheetName = "b",
append=TRUE)
write.xlsx2(x= df_all2[["c"]], file = output_file2, sheetName = "c",
append= TRUE)
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