[R] function changes argument

[Moeltner, Andreas]

Dear R-list,

the following function f changes L. I thought, assignments within
functions are only local?


f<-function(LL)
{ for (ll in LL)
  { ll$txt<-"changed in f"
  }
}

l<-list(txt="original value")
L<-list(l)
L[[1]]$txt 
f(L)
L[[1]]$txt


gives (using R 2.3.1):

...
> L[[1]]$txt
[1] "original value"
> f(L)
> L[[1]]$txt
[1] "changed in f"
> 

Thanks in advance

Andreas