[R] Linear regression and slope from 1

Ben Bolker bolker at ufl.edu
Tue Oct 16 05:23:12 CEST 2007




Dan-157 wrote:
> 
> 
> Dear R-Users,
> 
> I am new to R, so please excuse the ignorance.
> 
> I have data:
> x (2.14, 2.41, 1.09, 0.17, 8.18)
> y (3.81, 5.13, 0.63, 0.75, 6.35)
> 
> I would like to use simple linear regression and test 2 things:
> 1) slope of line of best fit is statistically different from 1
> 2) y-intercept is statically different from 0
> 

x <- c(2.14, 2.41, 1.09, 0.17, 8.18)
y <- c(3.81, 5.13, 0.63, 0.75, 6.35) 

lm(y~x)    ## regular regression
L1 <- lm(y~x+offset(x))  ## regression, tested vs slope=1
summary(L1)

  Ben Bolker

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