Dear All,
is there a possibility to provide a default for the first argument in an
assignment function?
I could not find out if and how. You see in the example below that not
explicitly stating the first argument leads to errors.
Thanks,
Heinz Tüchler
### example of assignment function
'testfun<-' <- function(x=a, y=b, value)
{ x <- x+ y+ value
print(x)
x }
a <- 0; b <- 1; c <- 2
testfun(c, 2) <- 2 # result: 6
c <- 2
testfun(c ) <- 2 # result: 5
testfun( , 2) <- 2 # Error: argument is missing, with no default
testfun(y=2) <- 2 # Error: target of assignment expands to non-language
object
testfun() <- 2 # Error: invalid (NULL) left side of assignment
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status Patched
major 2
minor 3.1
year 2006
month 07
day 23
svn rev 38687
language R
version.string Version 2.3.1 Patched (2006-07-23 r38687)
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