Absolutely, I was not expecting agreement with the bank, I just think the creation of an unbalanced transaction is bad form.
David Carlson On Wed, Jan 9, 2019, 9:03 AM John Ralls <jra...@ceridwen.us wrote: > > > > On Jan 9, 2019, at 6:26 AM, Michael or Penny Novack < > stepbystepf...@comcast.net> wrote: > > > > On 1/8/2019 11:50 PM, John Ralls wrote: > >> The answer is probably in app-utils/calculation. All of that was > probably written before Guile grew a rational number class and I think that > GncNumerics get converted to doubles before being passed to the interest > functions. That would pretty much guarantee rounding issues. > >> > >> Regards, > >> John Ralls > > I will repeat, this sort of "rounding error" is not a bug. > > > > If two persons set out to perform a calculation which can be done by a > number of methods with rounding involved at numerous places and no > agreement as to either the method to be used or the precision maintained at > each step THERE IS NO REASONABLE EXPECTATION THAT THEIR ANSWERS WILL MATCH > EXACTLY. > > > > Treated as a "bug", it might* be possible to change the code so as to > match the answers of a particular lending institution, but then could be > wrong for another lending institution that used different methods or > rounding than the first. > > > > Michael D Novack << who in my working days often had to compute the > "fuzz" for comparisons >> > > > > * Might, because you have no reason to suppose that a lending > institution necessarily used the same methods/rounding for car loans as for > house mortgages. > > Which is why GnuCash mostly uses rational numbers and no rounding for > internal calculations. Using binary floating-point in financial software is > a bug on its own, so that “mostly” is a bug. It needs to be “only”. > > This isn’t about matching the results with someone else’s computer, this > is about internal consistency in GnuCash. > > Regards, > John Ralls > > > _______________________________________________ > gnucash-user mailing list > gnucash-user@gnucash.org > To update your subscription preferences or to unsubscribe: > https://lists.gnucash.org/mailman/listinfo/gnucash-user > If you are using Nabble or Gmane, please see > https://wiki.gnucash.org/wiki/Mailing_Lists for more information. > ----- > Please remember to CC this list on all your replies. > You can do this by using Reply-To-List or Reply-All. _______________________________________________ gnucash-user mailing list gnucash-user@gnucash.org To update your subscription preferences or to unsubscribe: https://lists.gnucash.org/mailman/listinfo/gnucash-user If you are using Nabble or Gmane, please see https://wiki.gnucash.org/wiki/Mailing_Lists for more information. ----- Please remember to CC this list on all your replies. You can do this by using Reply-To-List or Reply-All.
