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dazzed
2010 Oct 26
2
anomalies with the loess() function
...loess() (always!!!)
#I generate 2 fictious vectors
a<-sample(c(sample(1:1000,100),rep(NA,50)))
b<-sample(c(sample(1:1000,100),rep(NA,50)))
#lm() has no problems..can handle the missing values
plot(a,b)
abline(lm(b~a),col="red",lwd=2)
#loess return a plain mess like it would go dizzed with ordering or
something.
#Off course lowess() turns useless in presence of NAs, I don't even try it.
lines(loess(b~a))
#I get rid off NAs and compare lowess() & loess() performance, expecting to
#obtain the same result as both functions implement local weighted
regressions
a<-na.om...