Reorder Levels of Factor

DESCRIPTION:

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.

USAGE:

relevel(x, ref, ...)

REQUIRED ARGUMENTS:

x
An unordered factor.
ref
The reference level, as a string or a number.

OPTIONAL ARGUMENTS:

...
Additional arguments for future methods.

VALUE:

A factor of the same length as x.

SEE ALSO:

,