The discount curve building code in QuantLib has shown some
overly large numerical instabilities. We have used the same example parameters (taken from the Swap example in
QuantLib) for years; it currently fails to solve for a rate at some
term further out the curve. So I made the decistion to disable this just in the examples in order to not upset the
CRAN testing framework. The examples now use a flat curve instead.
I also updated one function to silence some new warnings from R-devel about symbols from another packages’s namespace (in this case
rgl, and it is just for surface plots, a purely cosmetic function).