[R] How to make a deep copy of a list?

[Jeff Newmiller]

Or modifying the C code to conform with the usual functional copy-on-write paradigm used throughout most of R.

On November 12, 2022 12:04:57 PM PST, Giovanni Petris <gpetris using uark.edu> wrote:
>Hello everybody,
>
>Does anybody know how to obtain a deep copy of a list?
>
>The context is the following. I am passing a list to a function which, in turn, passes it to compiled C code via .Call. The problem is that the C code modifies elements of the list so that, after the R function returns, I end up with a modified version of the list argument. I believe passing to the function a deep copy of the list argument would solve my problem.
>
>Thank you in advance for the help!
>
>Giovanni
>
>--
>Giovanni Petris
>Professor and Director of Statistics
>Department of Mathematical Sciences
>University of Arkansas
>Fayetteville, AR 72701
>USA
>
>
>
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>
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-- 
Sent from my phone. Please excuse my brevity.