Hey, I have a bit of code that died on a domain error when doing an arcsin, and apparently it's because floating point subtraction is having problems. I know about the impossibility of storing floating point numbers precisely, but I was under the impression that the standard used for that last digit would prevent subtraction errors from compounding.
Is there a simple solution to this problem, or do I need to run some sort of check at every subtraction to make sure that my float does not deviate? I'm not sure I know even how to do that. A sample of the failure: ipdb>1.0000000000000001 == 1 True ipdb>R 0.69999999999999996 ipdb>R==.7 True ipdb>y2 3.2999999999999998 ipdb>y2 == 3.3 True ipdb>cirY-y2 0.70000000000000018 ipdb>cirY-y2 == .7 False I was unable to find solutions when searching the web because all of the hits I got were discussing display issues, which I'm not concerned with. Thanks, Adam -- http://mail.python.org/mailman/listinfo/python-list