I am creating an R code from scratch that is replicating an existing model in VBA that loops over improvements using Newton Raphson several times until the output differences stabilise. As such any small rounding differences on what is being inputted into the start of the code end up causing it to fall over.

I am creating an R code from scratch that is replicating an existing model in VBA that loops over improvements using Newton Raphson several times until the output differences stabilise. As such any small rounding differences on what is being inputted into the start of the code end up causing it to fall over.

I can find the path to R by using Sys.getenv() like so: