On Mar 23, 2012, at 9:38 AM, 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")
Why are you using dec="," when you have decimal points in the file?
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.
You could read the FAQ on this matter ... number 7.21 or in that
general vicinity. But it would be easier to fix the error in your
input statement.
--
David Winsemius, MD
West Hartford, CT
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