In my experience, this has always been due to the presence of
non-numeric values in the input.
In the example you show, it is not obvious that there is any. I would
start by first inspecting the input file very carefully, using a text
editor outside of R. Since your example appears to have only one
column of data, you could try reading it with the scan() function.
This might produce additional information that would help you
identify any non-numeric data. Using count.fields() on the data file
might reveal something.
If "Mean1" is an element of "data", then simply typing "Mean1" at the
prompt should produce a "not found" message. Yet Mean1 was found.
Have you omitted something in your email, or is there another object
named "Mean1"?
-Don
At 4:50 PM +0300 6/17/05, Johanna Sundvik wrote:
>Hi!
>
>I have had this problem for a long time. I have tried to study the manuals and
>search the mailing lists, but I can not solve this. I think there
>has to be one
>simple solution to this, but I just can not find it.
>
>I have saved the data in excel (csv-format). Then I read the data in R e.g.
>
>>data <- read.csv2("example.csv", header=TRUE)
>
>I look the data and it looks ok. E.g
>
>>data
> Mean1
>1 4.4332
>2 8.5113
>3 35.1624
>4 9.1693
>5 2.974
>6 65.1578
>7 43.2241
>8 3.1278
>9 5.3364
>10 3.9767
>
>However, this "Mean1" is categorical when it should be real numbers.
>
>> Mean1
>[1] 4.4332 8.5113 35.1624 9.1693 2.974 65.1578 43.2241 3.1278 5.3364
>Levels: 2.974 3.1278 35.1624 4.4332 43.2241 5.3364 65.1578 8.5113 9.1693
>
>Why R does not understand that this should be real numbers? What am I doing
>wrong here? Thanks for your help.
>
>Regards,
>Johanna Sundvik
>
>______________________________________________
>R-help@stat.math.ethz.ch mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
--
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
______________________________________________
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
