What is the point of the 'endrule' attribute of smooth()'s return
value?
For the simpler smooths (not involving 'S'?) it is value of the endrule
argument, for more complicated smooths it is the endrule not asked for (the
choices are 'Tukey' and 'copy'). For kind="S", it is
not in the return
value, no matter what the input is.
kinds <- c("3RS3R", "3RSS", "3RSR",
"3R", "3")
sapply(kinds, function(k)attr(smooth(sin(1:10),kind=k), "endrule"))
# 3RS3R 3RSS 3RSR 3R 3
# "copy" "copy" "copy" "Tukey"
"Tukey"
sapply(kinds, function(k)attr(smooth(sin(1:10),kind=k,
endrule="Tukey"),
"endrule"))
# 3RS3R 3RSS 3RSR 3R 3
# "copy" "copy" "copy" "Tukey"
"Tukey"
sapply(kinds, function(k)attr(smooth(sin(1:10),kind=k,
endrule="copy"),
"endrule"))
# 3RS3R 3RSS 3RSR 3R 3
#"Tukey" "Tukey" "Tukey" "copy"
"copy"
Bill Dunlap
TIBCO Software
wdunlap tibco.com
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