As.numeric(as.character(factor.level.to.convert))
On Mar 23, 2012 11:40 AM, "sandro" <sonavarr@gmail.com> 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
>
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