Missing hyperparameters not throwing error

[johnpaulgosling]

The following code:
matern(data.frame(x=1),data.frame(x=2),list(nu=1.5))
is missing the theta parameter.
It returns numeric(0) rather than giving a useful error and it could lead to issues if the function was used in a loop. Is it possible to add a check that the parameters have been specified?

[andy-iskauskas]

This should be fixed now in v1.0.1 (currently on github; hopefully soon to be on CRAN). Running the line of code in your example the function now returns No correlation length theta specified and stops, which should avoid problematic behaviour!