interaction.positioned
From HH v3.1-8
by Richard Heiberger
interaction method for positioned factors.
This is intended to be a method for interaction
for positioned
factors. Since interaction
is not currently implemented as
a generic, interaction.positioned
is a standalone function.
The result is assigned a position
. The position for each interaction
level is the position of the corresponding a
factor plus a
scaled level of the b
factor. The default scale is .1.
- Keywords
- regression, dplot
Usage
interaction.positioned(..., ## exactly two factors
drop = FALSE, sep = ".",
b.offset=0,
b.scale=.1)
Arguments
- ...
- exactly two factors. The first
factor
a
is used as the major factor in sort order. The second factorb
is used as minor factor in sort order. - b.offset
- amount added to
position(b)
to adjust appearance. - b.scale
- scale to relate units of
position(a)
to units ofposition(b)
. - drop, sep
- See
factor
.
Value
"positioned"
object containing the ordinary interaction with a"position"
attribute.
See Also
Examples
a <- positioned(letters[c(1,2,3,1,2,3)], value=c(1,4,9))
b <- positioned(LETTERS[c(4,4,4,5,5,5)], value=c(1,2))
a.b <- interaction.positioned(a, b)
a.b.2 <- interaction.positioned(a, b, b.scale=.2)
b.a <- interaction.positioned(b, a)
Community examples
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