From: Jean Eid <jeaneid_at_chass.utoronto.ca>

Date: Mon 15 Aug 2005 - 02:05:42 EST

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 Received on Mon Aug 15 02:18:23 2005

Date: Mon 15 Aug 2005 - 02:05:42 EST

can you give the line you are using to import the data.

On Sun, 14 Aug 2005 ftorrei2@uiuc.edu wrote:

> Well, you were right. When I check with str() or summary(),

*> the data frame appears as having a factor for that column.
**> However, if I ask is.factor(C2), I get FALSE, and if I ask
**> is.numeric(C2) I get TRUE. This seems strange.
**> So I decided to reimport the dataframe, this time with NA as
**> undefined values, and not ?. C2 was imported as a numeric
**> variable, as checked with str() and is.numeric(). But I still
**> get the indexes and not the values when I use C2 for any
**> purpose, just as happened before. How can this be possible?
**> All the other columns in the table behave properly.
**> The only difference I see between this columns ans the others
**> is that it contains NA values.
**>
**> Thanks again,
**> Francisco Torreira
**>
**>
**>
**>
**> ---- Original message ----
**> >Date: Sun, 14 Aug 2005 10:11:15 +0100
**> >From: Patrick Burns <pburns@pburns.seanet.com>
**> >Subject: Re: [R] Problem with numeric variable
**> >To: ftorrei2@uiuc.edu
**> >
**> >I think your problem is that you have a factor rather
**> >than a numeric vector (even though you say you checked
**> >with 'is.numeric'). Missing values should be represented
**> >by 'NA' and not by '?' which is what makes me think you
**> >have a factor.
**> >
**> >Patrick Burns
**> >patrick@burns-stat.com
**> >+44 (0)20 8525 0696
**> >http://www.burns-stat.com
**> >(home of S Poetry and "A Guide for the Unwilling S User")
**> >
**> >ftorrei2@uiuc.edu wrote:
**> >
**> >>Hello all,
**> >>
**> >>I posted a question some days ago without getting any answers,
**> >>perhaps, as one of you kindly pointed out, because the
**> >>question was not clearly stated. Let me reformulate it:
**> >>In a frame, a column named C2 represents a numeric variable
**> >>(checked with is.numeric(C2)). Some rows in the frame have an
**> >>undefined value for C2, represented in the table by a ? sign.
**> >>The remaining rows have numeric values with 2 decimals. For
**> >>example, row 10 has 43.70 for C2, while row 1 has ?. The
**> >>problem is that when I list C2 values (or when I try to plot
**> >>them, etc), these values are not the ones that appeared in the
**> >>table. Below are the first 3 lines of what I get when I list C2:
**> >>
**> >>
**> >>>C2
**> >>>
**> >>>
**> >>[1] 43 47 96 62 87 55 1 98 121 1 1 1 67 1 112 1 93 44
**> >>[19] 85 569 52 110 126 95 92 60 36 383 373 298 274 406 208 175
**> >>293 306
**> >>[37] 305 172 134 115 94 84 104 99 64 271 269 310 268 359 443
**> >>248 204 345
**> >>
**> >>These are not the correct values for C2, and I guess that they
**> >>are just row numbers. How can I get the correct C2 values
**> >>ready for analysis? Is this problem related to the fact that
**> >>some rows have a ? value for C2?
**> >>
**> >>Thanks in advance,
**> >>Francisco Torreira
**> >>Francisco Torreira
**> >>Spanish, Italian and Portuguese
**> >>Univ. of Illinois at Urbana-Champaign
**> >>707 South Mathews Aven.
**> >>4031 FLB
**> >>Urbana, IL, 61801
**> >>
**> >>______________________________________________
**> >>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
**> >>
**> >>
**> >>
**> >>
**> >>
**> >
**> Francisco Torreira
**> Spanish, Italian and Portuguese
**> Univ. of Illinois at Urbana-Champaign
**> 707 South Mathews Aven.
**> 4031 FLB
**> Urbana, IL, 61801
**>
**> ______________________________________________
**> 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
**>
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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 Received on Mon Aug 15 02:18:23 2005

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