I am using R to do a loess normalisation procedure. In 1.5.1 I used the following commands to normalise the variable "logratio", over a 2d surface (defined by coordinates x and y):
array <- read.table("121203B_QCnew.txt", header=T, sep="\t") array$logs555<-log(array$s555)/log(2) array$logs647<-log(array$s647)/log(2) array$logratio<-array$logs555-array$logs647 array$logav<-(array$logs555+array$logs647)/2 library(modreg) loess2d<-loess(logratio~x+y,data=array) array$logratio2DLoeNorm <-array$logratio - predict.loess(loess2d, array)
However in 1.8.1 all goes well until the last step when I get an error:
Error: couldn't find function "predict.loess"
Can anyone help ?
Use predict() instead of predict.loess() (the method is hidden in a namespace, you should use the generic function).
Uwe Ligges
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