The gss Package - NexTag Supports Open Source Initiatives
The gss Package - NexTag Supports Open Source Initiatives
The gss Package - NexTag Supports Open Source Initiatives
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
22 mkrk.nominal<br />
mkrk.nominal<br />
Crafting Building Blocks for Discrete Splines<br />
Description<br />
Usage<br />
Craft numerical functions to be used by mkterm to assemble model terms involving factors.<br />
mkrk.nominal(levels)<br />
mkrk.ordinal(levels)<br />
Arguments<br />
levels<br />
Levels of the factor.<br />
Details<br />
Value<br />
For a nominal factor with levels 1, 2, . . . , k, the level means f(i) will be shrunk towards each other<br />
through a penalty proportional to<br />
where f(.) = (f(1) + . . . + f(k))/k.<br />
(f(1) − f(.)) 2 + . . . + (f(k) − f(.)) 2<br />
For a ordinal factor with levels 1 < 2 < . . . < k, the level means f(i) will be shrunk towards each<br />
other through a penalty proportional to<br />
A list of two components.<br />
(f(1) − f(2)) 2 + . . . + (f(k − 1) − f(k)) 2<br />
fun<br />
env<br />
Function definition.<br />
Portable local constants derived from the arguments.<br />
Note<br />
mkrk.x create a bivariate function fun(x,y,env,outer=FALSE), where x, y are real arguments<br />
and local constants can be passed in through env.<br />
Author(s)<br />
See Also<br />
Chong Gu, 〈chong@stat.purdue.edu〉<br />
mkterm, mkrk.cubic, and mkrk.tp.
Change language