Regarding the flame, your might be interested in the following:
read.table(myfile, as.is=T)
which will interpret character columns as character rather
than factor and still reads in the numeric columns as numbers.
You can also specify specific columns such as as.is=3:4 if you
want columns 3 and 4 to be character but other character columns
to be factors.
---
Date: Mon, 15 Mar 2004 11:04:08 -0500 (EST)
From: Tom Blackwell <tblackw at umich.edu>
To: Janet Gannon <jangann at mote.org>
Cc: <r-help at stat.math.ethz.ch>
Subject: Re: [R] Simple numeric "as.is" question
Janet -
Try x2 <- as.numeric(as.character(x))
hist(x2)
I'm not a Windows user, so I can't test this before sending.
It might solve the problem, might not.
(Flame !! : This is just ONE MORE example of the difficulties
caused by the default behavior of read.table() to make things
into factors. I sincerely wish the default were to preserve
character data as character.)
- tom blackwell - u michigan medical school - ann arbor -
On Mon, 15 Mar 2004, Janet Gannon wrote:
> I am reading a list of numbers from my clipboard, and have been
> successful, except I can't make a histogram as R doesn't recognize
my
> variable as numeric. I know I need to use "as.is", but the
specifics
> escape me.
>
> I have used x<-read.table("clipboard", header=F) to import
from a txt
> file. How do make this numeric? Thanks, J.
>
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