Per Bothner wrote:
> Well, it seems logical to generalize "+nan.0" to "+nan.NNNNN".

Perhaps, but once you have a read/write syntax that allows you to
specify the specific bit pattern you need to consider (a) how to specify
the precision and (b) if and how to specify a nan without specifying the
  bit patterns.

Regards,

Alan
--
Dr Alan Watson
Centro de Radioastronomía y Astrofísica
Universidad Astronómico Nacional de México