Maurice LeBrun wrote: >Arjen Markus writes: > > Werner Smekal wrote: > > > > >Hello Andrew, > > > > > > > > > > > > > > >Ok, sounds good. Only problem I see is, that the value of these > > >variables will likely not be defined, since it's not cpp and I have no > > >constructor where I can set them. And than I can't find out, what was > > >set or not (since they may and will have any value). But I'll have a > > >look and commit the changes if I find a solution (or if this problem > > >doesn't exist anyway). > > > > > > > > One way to detect missing values is to initialise these variables to a known > > reserved value. My favourite is -999.0: > > - It can be represented exactly (!) in single and double precision, so > > no comparison > > problems as with -99.99 or the like > > - Because it is a negative value, it is much less likely to occur in > > (measurement) > > data than, say, 999.0 > > - It stands out: it is obviously a constructed value > >Great minds think alike: > >$ grep UNDEF include/plplotP.h >#define PL_UNDEFINED -9999999 > >:) > > So we have already defined the undefined ...
Regards, Arjen ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
