yes, you can use an offset, e.g.,
x <- runif(100, -3, 3)
y <- 2 + x + rnorm(100)
lm(y ~ x)
lm(y ~ offset(x))
I hope it helps.
Best,
Dimitris
On 10/22/2010 4:13 PM, Czerminski, Ryszard wrote:
I want to fit a linear model with fixed slope e.g. y = x + b
(instead of general: y = a*x + b)
Is it possible to do with lm()?
Regards,
Ryszard
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Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center
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