>
> I have no way to determining _why_ it is not numeric, but it simply is ...
> not. Your input method turned it into a factor. Perhaps there was one
> missing delimiter, or there was a stray character in one of the entries in
> the file. Who knows. Why waste time arguing? Follow the directions for
> fixing the problem.
>
Hi David,
Thanks for your time.
I thinks it works now.
> str(assame$Login)
Factor w/ 419 levels ".00","1.00","10.00",..: 114 283 217 216 14 1 2 2 407
327 ...
> is.numeric(assame$Login)
[1] FALSE
>as.numeric(assame$Login) //convert to numerics
> str(as.numeric(assame$Login))
num [1:35943] 114 283 217 216 14 1 2 2 407 327 ...
the I did some thing like this :
> avglog <- with(assame, tapply(as.numeric(Login), stdate, mean) )
> avglog
01/11/09 00:00 02/11/09 00:00 03/11/09 00:00 04/11/09 00:00 05/11/09 00:00
145.0176 135.5207 133.0390 131.1457 132.3732
06/11/09 00:00 07/11/09 00:00
129.6357 133.4521
Am I right ?
Thanks & Rg
Mohan L
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