Add `R_CheckUserInterrupt`?

[jessexknight]

Thanks for your work on this package.

I have used lhs::randomLHS(n,k) many times with n ~ 100,000 and k ~ 100 and the results were always quite fast. Today I explored lhs::optimumLHS(n=1000,k=10) ... it's still running after about 10 minutes, and I cannot interrupt it in the usual way (CTRL+C in terminal).

It seems there is an Rcpp solution to this: R_CheckUserInterrupt, though it may need some extra code to exit safely, as discussed here. Would you consider adding this to some of the particularly long-running LHS algorithms?

[bertcarnell]

Thanks for your comment and feature request. This is not going to be as easy as adding R_CheckUserInterrupt. In designing the library, I created an underlying C++ library, lhslib (https://github.com/bertcarnell/lhslib) which contains the looping structure in optimumLHS. Then in the R package, I wrap the call through an Rcpp interface and then wrap that call with the R interface. The advantage is that it is more modular, the disadvantage is getting the R interrupt message into the C++ loop is not as easy. I'm going to have to research this.