[R] coefficients regression

[Viechtbauer Wolfgang (STAT)]

Try:

regression <- lm (biomass ~ poly (temperature, degree=2, raw=TRUE))

See the help page for poly what raw=TRUE does.

Best,

-- 
Wolfgang Viechtbauer
 Department of Methodology and Statistics
 University of Maastricht, The Netherlands
 http://www.wvbauer.com/



----Original Message----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of romi at aon.at
Sent: Monday, May 21, 2007 10:37 To: r-help at stat.math.ethz.ch
Subject: [R] coefficients regression

> Hi,
> I would like to calculate a polynomial regression with R, but I don't
> get the same coefficients as when using SPSS. Is there a way to
> transform the coefficients?  
> 
> I use:
> regression <- lm (biomass ~ poly (temperature, 2))
> 
> Thank you,
> Romana Limberger