Uwe Brauer <o...@mat.ucm.es> writes: >> Uwe Brauer <o...@mat.ucm.es> writes: > > >> I'm not very familiar with calc, but am wondering if the issue is the >> 'nan'. In many languages, a nan is a 'polluting' variable i.e. once you >> have a nan as a form anywhere in your calculation, the result will >> always be a nan. Many languages actually have a special function to test >> for a nan because it isn't actually a 'value'. Don't know if this is the >> case with calc. > > Yeah, when I googled, I found complains about nan using in calc but I > did not really found an working alternative. > >> Perhaps an alternative strategy might help. Could you address what is >> generating the nan and change that so that it generates something else, >> possibly even a blank string and avoid the nan altogether? > > I tried nil and other expressions but non really worked, so maybe a calc > guru could clarify? >
Could you write the formulas in lisp instead? You might be able to control things more easily: (info "(org) Formula syntax for Lisp") -- Nick "There are only two hard problems in computer science: cache invalidation, naming things, and off-by-one errors." -Martin Fowler
