Darren Dale wrote: >Thank you, Andrew (Baker's Dozen) Straw. > > Hey, stop thanking me! ;) Seriously, it's me who should be thanking you for all the work you're doing on the PS and latex fronts. I'm just glad I can do a couple of minor things to help you along the way. >Does this look about right? > > >def isnan(a): > return reshape(array([isnan64(i) for i in ravel(a)],'b'), shape(a)) > > It looks fine to me -- it matches the behavior of numpy's isnan.