On Tue, Mar 18, 2014 at 8:23 AM, Vinzent Steinberg <[email protected]> wrote: > Regarding the cancellation issues: Isn't it possible to rewrite expressions > such that they give smaller rounding errors when evaluated using floating > point arithmetic? (Like x^2 - y^2 = (x + y)(x - y).) > Sympy could do this.
Sometimes it can help to do this, but sometimes the only solution is some adaptive arbitrary precision, as sympy does in the .n() function. > > Does anyone know of some work on rewriting general expressions into > numerically more favorable forms? Ondrej -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CADDwiVABHVQM0K%2B9faS9gQw-6y8z8xRju0Z7poarK1-oedh-5g%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
