about lm
On Nov 17, 2012, at 8:56 AM, FJ M wrote:
attach(attach(dat)) should be attach(dat) Is attach() broken? I've been using attach() successfully for months. I was surprised that header=TRUE did not map the headers to the data.
???. 'header=TRUE' changes how read.table() and derivatives handle the first line of a input file. You may be expressing surprise that the the names of list elements are not in the search path. (Dataframes are lists.)
But since attach() worked, I've never asked for an enhancement to the various read functions. Thanks, Frank
CC: soniaamin5 at gmail.com; r-help at r-project.org From: dwinsemius at comcast.net To: chicagobrownblue at hotmail.com Subject: Re: [R] about lm Date: Sat, 17 Nov 2012 08:31:01 -0800 On Nov 17, 2012, at 4:29 AM, FJ M wrote:
dat=read.csv("c:\\ven.csv",header=TRUE,sep=";");
attach(attach(dat))
It is generally less error prone to avoid attach (even once).
dat lm.1<-lm(ve~ su)
And instead use: lm.1<-lm(ve~ su, data=dat)
summary(lm.1) GL Frank
Date: Fri, 16 Nov 2012 20:42:39 +0100
From: soniaamin5 at gmail.com
To: r-help at r-project.org
Subject: [R] about lm
Dear friends,
I have a csv file entitled ven.csv located in C:\\, this file
contains only
two columns:"ve" and "su" I have written the following lines:
data=read.csv("c:\\ven.csv",header=TRUE,sep=";");
lm(ve~ su)
I have obtained the following message:
Error in eval(expr, envir, enclos) : object 've' does not exist.
What's the
problem? thank you for your help in advance
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