Hi,
I'm pretty new to R.
I have an object (say a list) and I I have a function that I call on
various columns in that list (excuse terminology if it's wrong/ambiguous).
Imagine its like this (actual values are unimportant) and called mylist:
>mylist
A B
1 5
2 5
3 6 4 8
5 0
I have a function:
foo = function(param){
#modify list A or B values depending on whether A or B's passsd in (via
'param')
param[someindex]=another_value #doesn't change value in lits$A or
list$B (whichever's been passed in as 'param')
#I want something like:
#if 'param' is list$A then list$A[someindex]=another_value
#else if 'param' is list$B then list$B[some_index] = another_value
}
I then call this function on mylist$A (i.e. foo(mylist$A) and then on
mylist$B (i.e. foo(mylist$B))
so 'param' in function foo is either mylist$A or mylist$B - can I tell
which it is so that when param[someindex] is changed, it's actually
mylist$A or mylist$B that's changed?
If I modify param values in foo(), they're not modified in list...so is
there a way to tell whether param represents list$A or list$B and hence
allow to me to modify those actual values rather than 'param'?
Thanks for help,
Martin
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