Hi

Being able to do object oriented programming in R is really good. I now
started using the Reference Classes and really like it.

Though, I have one problem: I cannot find a way to update a method on an
existing object.

The flexibility that scripting gives (really needed for interactive data
analysis) is lost if everything have to be recalculated all the time.

For example:
cl1 <- setRefClass("cl1",
  fields=list(x="data.frame"),
  methods=list(
    init=function(){"Read and process data"},
    fitModel=function(){"Fit different kind of models and keep the results
in x and other fields"}

)
)

tmp <- cl1$new()
tmp$x <- 5
tmp$fun()

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