Also look at the documentation for read.csv2().
--
David.
On Jun 2, 2009, at 5:43 AM, Cecilia Carmo wrote:
> Thank you all!!!
>
> The problem was the decimal symbol! My data was saved in a txt file,
> so I?ve introduced the dec="," in ?read.table? and it worked.
> What I?ve done was
>
coeficientes<-read.table("coeficientes.txt",sep="\t",header=T,dec=",")
>
> Then, subset worked fine
> coeficientesWanted<-subset(coeficientes,b1>0)
>
> Thanks again,
> Cec?lia Carmo (Universidade de Aveiro ? Portugal)
>
> 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
>
> I?ve done
> coeficientes$b1<-as.numeric(as.character(coeficientes$b1))
> And b1 was substituted by NA?s
>
> Then I?ve 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,
> Cec?lia
>
>
> Em Mon, 01 Jun 2009 13:11:48 -0500 (CDT)
> markleeds at 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, markleeds at 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.carmo at 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 I?ve tried:
>>> coefSelected<-subset(coeficientes,b1>0)
>> But I?ve got the following
>> Warning message:
>> In Ops.factor(b1, 0) : > not meaningful for factors
>> So I?ve 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,
>> Cec?lia Carmo (Universidade de Aveiro ? Portugal
David Winsemius, MD
Heritage Laboratories
West Hartford, CT