question on defaults for geom_smooth

[David Faden]

Hi,

What's the default method for doing a smooth in geom_smooth? I guess
loess, but what are the parameters used? Do the confidence bands come
from predict.loess? (Does anyone know of a good source for learning
more about how the estimated standard errors are computed?) Thanks
(and sorry if I've missed something obvious)!

David

[hadley wickham]

Hi David,

There are two default methods for geom_smooth:

* less than 1000 points, loess is used
* more than 1000 points, mgcv::gam(y ~ s(x, bs = "cs")) is used

Yes, the confidence bands come from predict.loess or predict.gam, and
you'll probably need to read the cited papers to figure out exactly
how they are calculated.

Hadley

--
http://had.co.nz/