Eckart Bindewald wrote:
Hello! In the book Modern Applied Statistics with S (4th ed), section 5.6 the concept of the "average shifted histogram" or ASH is mentionend. Also it is mentioned in the same section "The code used is in the scripts for this chapter" (from figure caption 5.8, analysis of the geyser duration data). *However*, I have trouble finding the code for that function! Admittedly, I am a newby to R. Where exactly do I find the scripts to that chapter? Commands like library(MASS), or help.search("average shifted histogram") did not help.
Secondly: Is the fact that I have trouble finding a routine for the average shifted histogram method a hint, that the method is outdated, and instead method X or Y should be used? The problem I am trying to solve is to smoothe a two-dimensional data set, the y-values change very rapidly between one and zero. The function "loess" in R seems to do a very reasonable job for that problem, but I would like to use a second and different method.
Any help is highly appreciated!
Thanks,
Eckart Bindewald
Try:
install.packages("ash")
library(ash)I have found "loess" (or possibly "locfit" in the package of the same name) more flexible though.
--sundar
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