[R] Force regression line to a 1:1 relationship

Patrick Breheny patrick.breheny at uky.edu
Wed Sep 14 16:52:14 CEST 2011

On 09/13/2011 04:27 PM, David Winsemius wrote:
> Also should be plotting against fitted() rather than regressors.

Both types of plots (vs. fitted values and vs. regressors) are very 
common.  The former is a default plot in R, the first one that appears 
if you submit:

fit <- lm(y~X)

The latter type of plot is called a "partial regression plot" or "added 
variable plot".  They are discussed in any regression textbook, as well 
as wikipedia and probably dozens of other web sites.

Patrick Breheny
Assistant Professor
Department of Biostatistics
Department of Statistics
University of Kentucky

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