your data *seems* to have an unusual decimal separator. That would
explain why the two-step conversion to numeric fails, while the brute
conversion to numeric always gives the factor integer codes.
I don't know where your data comes from (str() would be helpful in any
case), but if you read it using read.table consider the dec=","
argument.
connection <- textConnection(
"caedois b1 b2 b3
1 0,033120395 -20,29478338 -0,274638864
2 -0,040629634 74,54239889 -0,069958424
5 -0,001116816 35,2398622 0,214327185"
)
d <- read.table(connection, head=T, dec=",")
str(d)
subset(d, d$b1>0)
# caedois b1 b2 b3
# 1 1 0.033120 -20.295 -0.27464
HTH,
baptiste
On 1 Jun 2009, at 22:34, Cecilia Carmo wrote:
>
>
>
>
>
> --- the forwarded message follows ---
>
> From: Cecilia Carmo <cecilia.ca...@ua.pt>
> Date: 1 June 2009 22:33:15 GMT+02:00
> To: "markle...@verizon.net" <markle...@verizon.net>
> Subject: Re: [R] subset dataframe/list
>
>
> Doesn´t work neither!
>
>> head(coeficientes)
> caedois b1 b2 b3
> 1 1 0,033120395 -20,29478338 -0,274638864
> 2 2 -0,040629634 74,54239889 -0,069958424
> 3 5 -0,001116816 35,2398622 0,214327185
> 4 10 0,171875
> 5 14 0,007288399 40,06560548 -0,081828338
> 6 15 0,027530346 0,969969409 0,102775555
>
> Iâve done
> coeficientes$b1<-as.numeric(as.character(coeficientes$b1))
> And b1 was substituted by NAâs
>
> Then Iâve done
> coeficientes$b1<-as.numeric(coeficientes$b1)
> And b1 was transformed in other numbers
> caedois b1 b2 b3
> 1 1 38 -20,29478338 -0,274638864
> 2 2 7 74,54239889 -0,069958424
> 3 5 2 35,2398622 0,214327185
> 4 10 48
> 5 14 15 40,06560548 -0,081828338
> 6 15 31 0,969969409 0,102775555
>
> Thanks anyway,
> CecÃlia
>
>
> Em Mon, 01 Jun 2009 13:11:48 -0500 (CDT)
> markle...@verizon.net escreveu:
>> hi: when I sent you my solution, I didn't realize that
>> you had factors. if you change the
>> factors to characters as described in that email, and
>> then use my approach , i think it should still work.
>>
>>
>>
>>
>>
>>
>> On Jun 1, 2009, markle...@verizon.net wrote: Hi:
>>
>> coeficientes[,(coeficientes[,"b1"] > 0)]
>>
>> will i think give you all the rows of the object where
>> b1 is greater than zero.
>>
>> I can't tell if coeficients is a data frame or a matrix
>> but the above should work in either case.
>>
>>
>>
>>
>>
>> On Jun 1, 2009, Cecilia Carmo <cecilia.ca...@ua.pt>
>> wrote: Hi R-helpers!
>>
>> I have the following object:
>>> head(coeficientes)
>> caedois b1 b2 b3
>> 1 1 0,033120395 -20,29478338 -0,274638864
>> 2 2 -0,040629634 74,54239889 -0,069958424
>> 3 5 -0,001116816 35,2398622 0,214327185
>> 4 10 0,171875
>> 5 14 0,007288399 40,06560548 -0,081828338
>> 6 15 0,027530346 0,969969409 0,102775555
>>
>> I´ve tried to subset it like this:
>>> coefSelected<-subset(coeficientes,"b1">0)
>> but it does nothing
>>
>> Then IÂve tried:
>>> coefSelected<-subset(coeficientes,b1>0)
>> But I´ve got the following
>> Warning message:
>> In Ops.factor(b1, 0) : > not meaningful for factors
>>
>> So IÂve tried:
>>> coefSelected<-subset(coeficientes,coeficientes$b1>0)
>> Warning message:
>> In Ops.factor(coeficientes$b1, 0) : > not meaningful for
>> factors
>>
>> I´ve done
>>> mode(coeficientes)
>> [1] "list"
>>
>> But I don´t know how to handle it!
>> Coul anyone help me?
>> Thanks,
>>
>> CecÃlia Carmo (Universidade de Aveiro  Portugal
>>
>> ______________________________________________
>> R-help@r-project.org 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.
>>
>
>
>
>
> <ATT00001.txt>
_____________________________
Baptiste Auguié
School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK
Phone: +44 1392 264187
http://newton.ex.ac.uk/research/emag
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