This function is required because there is no straightforward way to
over-write a value in a list with NULL without completely removing the entry
from the list as well.
Usage
nullify(obj, index)
# S3 method for default
nullify(obj, index)
Value
object with selected values NULLified
Arguments
obj
the R object to NULL a value in
index
an indexing vectors of values to NULL
Details
This returns a copy of the object modified with null slots; it does
not modify the input argument.
Default method will attempt to convert non-list objects to lists
with as.list, and then back to whatever they were by using a
function with name paste0("as.", class(obj)[[1L]])
if it exists and works. If the object cannot be coerced back
to its original type the corresponding list will be returned.
If this is not appropriate for your object type you can write an S3 method
for it.