April 6, 2004
1:49 p.m.
On Tue, 6 Apr 2004, Simon Percivall wrote:
So how should "2.2 - 1.2 - 1" be represented?
Matlab (Solaris 9): 2.22044604925031e-16 Octave (MacOS X 10.3): 2.22044604925031e-16 Python 2.3.3 (MacOS X 10.3): 2.2204460492503131e-16
Is this something you accept since Matlab does it?
I accept it, but not primarily because Matlab does it. It is fine to show a value different from zero in this case because the result really is different from zero. In this case those digits are necessary to represent the machine number. In other cases (such as 1.1) they are not. -- ?!ng