[R] how to update my own function

[Edwin Sun]

Hello all,

I wrote a function with many arguments. Then I need to call it many times
with changes on some arguments only. Is there any way to write a function or
have a method to "update" it, like the relationship between lm() and
update()?

Many thanks,

Edwin Sun

------------
This is the sample code.

> test <- function(y, z) { 
+   x <- y +1
+   w <- z * 2
+   result <- list(x=x, w=w)
+   class(result) <- "ego"
+   return(result)
+ }

> me <- test(y=3, z=4); me
$x
[1] 4

$w
[1] 8

attr(,"class")
[1] "ego"

> update(me, y=5)
Error in update.default(me, y = 5) : need an object with call component

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