On Jun 1, 2009, at 1:01 PM, Cecilia Carmo 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 the b1 variable is a factor. How it got that way is hard to
determine.
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"
So coeficientes could be just a list or more likely it is a data.frame.
What happens if you convert b1 to numeric? Try this way:
coeficientes$b1 <- as.numeric( as.character(coeficientes$b1) )
Then try subsetting.
See:
http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-do-I-convert-factors-to-numeric_003f
But I don´t know how to handle it!
Coul anyone help me?
Thanks,
Cecília Carmo (Universidade de Aveiro – Portugal
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