[R] Extracting arithmetic mean for specific values from multiple .txt-files

[jim holtman]

I think the real problem is the first data line:

2	1	1	3	27	0	6	1.200.995

Notice the two periods in the value.  The previous solution was
getting rid of all the periods.  If you leave out this value, you get
339.5.  if you change it to 1200.995, you get 345.21, so you data is
incorrect.

On Mon, Jul 9, 2012 at 9:54 AM, vimmster <superdodge at gmx.net> wrote:
> Dear Mr. Barradas,
>
> your solution comes very close to what I want.
>
> But I have two questions left:
>
>
> First question: If "R" computes the mean for the reaction times of test
> subject 34 (the example I provided above), it says "310112.0", but if I use
> the "mean"-function in Excel it says "345.210". Apart from the dots in the
> column of interest (which you mentioned before), the mean is obviously not
> the same. Do you have any idea why?
>
> Second question: Why are the dots in the column of interest problematic?
>
> Kind regards
>
> --
> View this message in context: http://r.789695.n4.nabble.com/Extracting-arithmetic-mean-for-specific-values-from-multiple-txt-files-tp4635809p4635854.html
> Sent from the R help mailing list archive at Nabble.com.
>
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-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.