[R] post hoc comparison regression slopes

[Richard Rowe]

Displaying considerable ignorance.

I need to do a post hoc comparison of regression slopes.

I've used

lm(response ~ factors/predictor -1)

and have a nice anova table with slopes and standard errors, and I could 
contrast the slopes with a cludged t-test (they are massively different and 
awful liberties could be taken), but is there an elegant, prebuilt method 
somewhere?

Thanks,

Richard Rowe

Richard Rowe
Senior Lecturer
Department of Zoology and Tropical Ecology, James Cook University
Townsville, Queensland 4811, Australia
fax (61)7 47 25 1570
phone (61)7 47 81 4851
e-mail: Richard.Rowe at jcu.edu.au
http://www.jcu.edu.au/school/tbiol/zoology/homepage.html