[R] read.xls: number of sheets

[Gabor Grothendieck]

A second possibility (not as automated but very simple to do)
is to read the first sheet with verbose = TRUE:

DF <- read.xls("test.xls", sheet = 1, verbose = TRUE)

and it will display the number of sheets in a message.

You can then read them in in a loop.

On Thu, Jul 2, 2009 at 11:05 AM, Gabor
Grothendieck<ggrothendieck at gmail.com> wrote:
> If you are on Windows and have Excel on the same machine
> then the code here:
>
> http://tolstoy.newcastle.edu.au/R/e6/help/09/03/7736.html
>
> will return the number of worksheets as well as a vector of
> the worksheet names.
>
> It seems that the email has somehow caused some of the
> lines to wrap so you will have to correct that.
>
> There is also some info on various methods of reading excel
> spreadsheets here:
> http://wiki.r-project.org/rwiki/doku.php?id=tips:data-io:ms_windows
>
> On Thu, Jul 2, 2009 at 10:22 AM, Lauri Nikkinen<lauri.nikkinen at iki.fi> wrote:
>> Hi,
>>
>> I'm trying to read several Excel sheets from an Excel file into a
>> list. I'm using
>> read.xls from package 'gdata'. I would like to know how I can
>> check the number of sheets before the loop (in the example below) so
>> that I could adjust the loop counter? Any suggestions?
>>
>> DF.list <- list()
>> for (i in 1:4) {
>>    DF.list[[i]] <- read.xls("sample_file.xls", sheet=i,
>> stringsAsFactors = FALSE)
>>    }
>>
>> Thanks,
>> -L
>>
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>>
>