On 23.03.2012 15:31, chuck.01 wrote:
Using your posed data, the variable price was numeric:
data.precios<-
read.table("http://r.789695.n4.nabble.com/file/n4498828/p_diarios.txt";,
header=T)
str(data.precios)
'data.frame': 1996 obs. of 2 variables:
$ time : int 37988 37991 37993 37994 37995 37998 37999 38000 38001 38002
...
$ price: num 18.1 26.1 30.9 34.7 27.6 ...
HOWEVER!
If I follow your code (eg. using " read.table(... , dec=",", sep="\t")":
data.precios<-
read.table("http://r.789695.n4.nabble.com/file/n4498828/p_diarios.txt";,
header =TRUE , dec=",", sep="\t")
str(data.precios)
'data.frame': 1996 obs. of 2 variables:
$ time : int 37988 37991 37993 37994 37995 37998 37999 38000 38001 38002
...
$ price: Factor w/ 1639 levels "10.80","12.53",..: 12 126 213 342 160 186
219 37 54 69 ...
It is a factor.... but I can change it like this:
Price<- as.numeric(data.precios$price)
Never ever! It will convertwed to the intergers representing the former
factors. You probbaly want as.numeric(as.character(...)) and have to
look why R has not read it as a numeric right away.
Uwe Ligges
str(lPrice)
num [1:1996] 12 126 213 342 160 186 219 37 54 69 ...
I think avoiding it ever becoming a factor would be the better path.
Good luck.
sandro wrote
Hello, I am relatively new to using R.
The text file contains the date and price . I want to read and manipulate
the data in R. However, when I use read.table, it treats all of the data
as "factors" and I do not know how to treat the data as numbers:
http://r.789695.n4.nabble.com/file/n4498828/p_diarios.txt p_diarios.txt
setwd ("C:\\Users\\Sandro\\Dropbox\\R")
data.precios<- read.table ("p_diarios.txt ", header =TRUE
, dec=",", sep="\t")
Time<- data.precios$time # 01.02.2004 - 12.05.2011
Price<- data.precios$price # Historical spot price
log.Price<- log(data.precios$price)
Error en Math.factor(c(12L, 126L, 213L, 342L, 160L, 186L, 219L, 37L, 54L,
:
log not meaningful for factors
As you can see, I cannot calculate the price logarithms.
Any help is appreciated.
Sandro
--
View this message in context:
http://r.789695.n4.nabble.com/How-to-convert-factors-to-numbers-tp4498828p4499019.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
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.
______________________________________________
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.
