Issues using xlsx package to insert data from R to excel

Question

I´m trying to create a new excel workbook from R to save a few small datasets using xlsx package. For some reason it was working fine, but i´m unable to do it again.

Answer 1

It is possible the problem is with Java, not XLConnect. Be sure you have Java installed by taking the test on the Java site -- it will confirm Java is correctly installed. Then make sure R knows the path to find the jre.dll or something like that file name for what is crucial.

Second, here is the code I have been using for a year, without the error message you got. If it helps you ....

read.xls <- function(filename, sheetnumber=1, sheetname=NULL, forceConversion=TRUE, startCol=0,  stringsAsFactors=TRUE) {
wb <- loadWorkbook(filename)
if (is.null(sheetname)) sheetname = getSheets(wb)[sheetnumber]
df <- readWorksheet(wb, sheet=sheetname, forceConversion=forceConversion, startCol=startCol)
if (stringsAsFactors) {
ischar <- sapply(df, class) == "character"
for (i in 1:length(df)) {
if (ischar[i]) df[,i] <- factor(df[,i])
}
}
df
}