Error: 'aggregate' is not an exported object from 'namespace:sp

[antaldaniel]

I am trying to use sp in a package and would need to refer to the aggregate function. However, I get this error, that had been around on various forums.
cnames <- sp::aggregate(cbind(long, lat) ~ id, data=final.plot, FUN=function(x) mean(range(x)))

I am getting
Error: 'aggregate' is not an exported object from 'namespace:sp'

In this case no packages are reloaded (no raster) so there is no name conflict. How can I refer to aggregate?

[edzer]

It is exported as an S3 generic for Spatial objects. So you package has to import sp, and then you can use it without the sp:: prefix (which only works for exported functions) if the first argument is of class Spatial (not so sure this is the case for your example).

[antaldaniel]

Hi, thanks for the reply, and thanks for the bit stupid question. There were a lot of old questions about this on various forums, so I thought to bring it here. What you write makes sense and works. I just moved sp from Imports to Dependencies, and unlike with other functions imported the whole sp package. I also added methods to imports, because the handling of S3 methods is in fact a package that is part of the basic R infrastructure. Thanks.

[edzer]

Good to hear that it works. It shouldn't be needed to have sp in Depends: if you only need to use this in your package.

[reginaldo-re]

This issue is a little bit tricky because the disaggregate method is exported but the aggregate method does not. So, someone can use sp::disaggregate() but can't use sp::aggregate().