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

vimmster 
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

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Thread (16 messages)

vimmster Extracting arithmetic mean for specific values from multiple .txt-files Jul 8 jim holtman Extracting arithmetic mean for specific values from multiple .txt-files Jul 8 vimmster Extracting arithmetic mean for specific values from multiple .txt-files Jul 9 Rui Barradas Extracting arithmetic mean for specific values from multiple .txt-files Jul 9 vimmster Extracting arithmetic mean for specific values from multiple .txt-files Jul 9 jim holtman Extracting arithmetic mean for specific values from multiple .txt-files Jul 9 Rui Barradas Extracting arithmetic mean for specific values from multiple .txt-files Jul 9 vimmster Extracting arithmetic mean for specific values from multiple .txt-files Jul 10 Rui Barradas Extracting arithmetic mean for specific values from multiple .txt-files Jul 10 vimmster Extracting arithmetic mean for specific values from multiple .txt-files Jul 10 Rui Barradas Extracting arithmetic mean for specific values from multiple .txt-files Jul 10 vimmster Extracting arithmetic mean for specific values from multiple .txt-files Jul 10 vimmster Extracting arithmetic mean for specific values from multiple .txt-files Jul 10 Rui Barradas Extracting arithmetic mean for specific values from multiple .txt-files Jul 11 vimmster Extracting arithmetic mean for specific values from multiple .txt-files Jul 11 vimmster Extracting arithmetic mean for specific values from multiple .txt-files Jul 12