How do I modify an argument being passed to a function in R? In C++ this would be pass by reference.
g=4
abc <- function(x) {x<-5}
abc(g)
I would like g to be set to 5.
How do I modify an argument being passed to a function in R? In
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How do I modify an argument being passed to a function in R? In C++ this would be pass by reference.
g=4
abc <- function(x) {x<-5}
abc(g)
I would like g to be set to 5.
There are ways as @Dason showed, but really – you shouldn’t!
The whole paradigm of R is to “pass by value”. @Rory just posted the normal way to handle it – just return the modified value…
Environments are typically the only objects that can be passed by reference in R.
But lately new objects called reference classes have been added to R (they use environments). They can modify their values (but in a controlled way). You might want to look into using them if you really feel the need…