It is not allowed to start a variable name with an underscore. So, you
must use "`" to call this non-conventional name:
> '_foo' <- function(x) 1
> attr('_foo', 'bar') <- 'pow'
Error: target of assignment expands to non-language object
> attr(`_foo`, 'bar') <- 'pow'
> '_foo'
[1] "_foo"
> `_foo`
function(x) 1
attr(,"bar")
[1] "pow"
>
Best,
Philippe Grosjean
Joseph Wang wrote:
> I'm having problems with functions starting with underscores
>
> '_foo' <- function(x) {1}
>
> seems to work
>
> but I can't assign an attribute to this function
>
> attr('_foo', 'bar') <- 'pow'
>
> Any way of doing this? This is for a C++ -> R wrapping system so I'd like to
> keep the C++ names which start with underscores.
>
> (please cc: responses to me personally)
>
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