>
> 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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