July 2014
M T W T F S S
« May    
 123456
78910111213
14151617181920
21222324252627
28293031  

“relevel” factors when using them to create dummy variables

?relevel

: The levels of a factor are re-ordered so that the level specified
by ‘ref’ is first and the others are moved down. This is useful
for ‘contr.treatment’ contrasts which take the first level as the
reference.

Comments are closed.