I have not completely followed the discussion, so excuse me if it was
already pointed out.
If numeric data are read as factors, this means that there are not only
numeric data in the column. It could be an empty space somewhere, or
some character that should be NA, or...
I think it is worth spending some time searching for the typo so that
the file will be read correctly in R.
HTH,
Ivan
--
Ivan Calandra, ATER
University of Reims Champagne-Ardenne
GEGENA² - EA 3795
CREA - 2 esplanade Roland Garros
51100 Reims, France
+33(0)3 26 77 36 89
ivan.calan...@univ-reims.fr
https://www.researchgate.net/profile/Ivan_Calandra
Le 12/11/14 15:56, David L Carlson a écrit :
Also look at the Frequently Asked Questions document that comes with your R
installation:
7.10 How do I convert factors to numeric?
It may happen that when reading numeric data into R (usually, when reading in a
file), they come in as factors. If f is such a factor object, you can use
as.numeric(as.character(f))
to get the numbers back. More efficient, but harder to remember, is
as.numeric(levels(f))[as.integer(f)]
In any case, do not call as.numeric() or their likes directly for the task at
hand (as as.numeric() or unclass() give the internal codes).
-------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77840-4352
-----Original Message-----
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Gerrit Eichner
Sent: Wednesday, November 12, 2014 8:06 AM
To: David Studer
Cc: r-help@r-project.org
Subject: Re: [R] factor levels > numeric values
Hello, David,
take a look at the beginning of the "Warning" section of ?factor.
Hth -- Gerrit
Hi everybody,
I have another question (to which I could not find an answer in my r-books.
I am sure, it's not a great issue, but I simply lack of a good idea how to
solve this:
One of my variables gets imported as a factor instead of a numeric variable.
Now I have a...
Factor w/ 63 levels "0","0.02","0.03",..: 1 NA NA 1 NA NA 1 1 53 10 ...
How can I transform these factor levels into actual values?
Thank you very much for any help!
David
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