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

[Patrick Breheny]

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)
plot(fit)

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