Derivatives of the difference between two smooths

[BenFN121]

Hi Gavin,

Is there any way that the capacity to apply the gratia::derivatives() to a difference_smooth created from gratia::difference_smooths() could be incorporated?

Many thanks,
Ben

[gavinsimpson]

I don't see any reason why not, in principle. I'll add this as a feature request.

[gavinsimpson]

See #264 and follow-up there.