Message-ID: <2954407796.1117558073@Lab26.DOMAIN.IE.PITT.EDU>
Date: 2005-05-31T20:47:53Z
From: sms13+@pitt.edu
Subject: simple predict question
Excuse the simple question...
I'm not sure what I'm doing wrong with predict, but let me use this example:
Suppose I do:
dat<-matrix(c(0,0,10,20),2,byrow=T)
lm1<-lm(dat[,2]~dat[,1])
Suppose I want to generate the linearly-interpolated y-values between the
point (0,0) and (0,20) at every unit interval.
I thought I just do:
predict(lm1, data.frame(seq(0,10,1))) to get 0,2,4,6...,18,20, but instead
I just get:
1 2
0 20
Any suggestions?
Thanks,
Steven