Hi
[EMAIL PROTECTED] napsal dne 27.06.2007 15:43:53:
>
> Thank you, but it still doesn't work completely
>
> Thanks to you and the "dec=","" option, I can now do cours[5,5]*5 and
get the
> exact value
>
> But I still cannot do matrix operations like cours[2,]%*%cours[5,]
As only you have cours we can only guess. You read it into data.frame
which can have columns of different type. So my bet is, that you have one
or more columns which is not numeric.
See how your cours looks like by
str(cours)
Regards
Petr
BTW. Maybe is time to look at some docummentation to R, especially R
intro.
>
> It says the arguments are neither matrix nor vectors.
>
> :(> Date: Wed, 27 Jun 2007 09:30:32 -0400> From: [EMAIL PROTECTED]>
> Subject: Re: [R] Import from excel> To: [EMAIL PROTECTED]> CC:
[EMAIL PROTECTED]
> math.ethz.ch> > Bruce Willy wrote:> > Hello,> > > > I have imported data
from
> Excel using the command > >
cours=read.delim("w:/apprentissage/cours_2.txt")>
> > after transforming my initial file with tab delimiters> > > > It
seemed to
> work> > > > It is 2-dimensionnal. When I type cours[5,5],> > I get this
type
> of message : "[1] 0,9760942761824 Levels: 0,495628477 0,893728761
0,89640592
> 0,903398558 ... 3,864414217"> > And when I want to multiply it, for
example by
> 2 (cours[5,5]*2), I get : "Warning message:* ceci n'est pas pertinent
pour des
> variables facteurs in: Ops.factor(cours[5, 5], 2)"> > i.e. approximately
"this
> is not relevant for factor variables.> > > > What can I do if I want to
> manipulate my variables ?> > > > Thank you very much > > You might try
the
> following:> > cours <- read.delim("w:/apprentissage/cours_2.txt",
dec=",")> >
> See the "dec" argument on the help page for read.delim().> > >
> _________________________________________________________________> > > >
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>
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> >
> > ______________________________________________> >
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> mailing list> > https://stat.ethz.ch/mailman/listinfo/r-help> > PLEASE
do read
> the posting guide http://www.R-project.org/posting-guide.html> > and
provide
> commented, minimal, self-contained, reproducible code.> > -- > Chuck
Cleland,
> Ph.D.> NDRI, Inc.> 71 West 23rd Street, 8th floor> New York, NY 10010>
tel:
> (212) 845-4495 (Tu, Th)> tel: (732) 512-0171 (M, W, F)> fax: (917)
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> and provide commented, minimal, self-contained, reproducible code.
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