Hi Hanen,
Take a look at ?write.table.  Also, try this:

write.table(df,"file_name.xls",col.names=FALSE,row.names=FALSE,sep="\t")

or

write.table(df,"file_name.xls",sep="\t")


HTH,

Jorge



On Mon, May 19, 2008 at 3:27 PM, hanen <hanen.mastouri@yahoo.fr> wrote:

>
> in order to export a data.frame to sheet.xls i try:
>
> write(df,file="file_name.xls")
>
> but when i open it a message appears:
>
> "impossible to oppen this file. her format is unvalid"
>
> knowen that i work with excel_2007
>
> what is the solution ?
> --
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