Jim,
Whatare some of the options available to GnuCash programmers today toimprove precision? Here is one group. Decimal-FloatingArithmetic GeneralDecimal Arithmetic http://speleotrove.com/decimal http://speleotrove.com/decimal/#decNumber http://speleotrove.com/decimal/#links http://speleotrove.com/decimal/#implement ThedecNumber Library Version 3.68 https://speleotrove.com/decimal/decnumber.html decimal— Decimal fixed point and floating point arithmetic https://speleotrove.com/decimal/decarith.html C++libraries Decimal-Arithmetic GMP https://gmplib.org/ GNUMPFR Library https://www.mpfr.org/ https://www.mpfr.org/ports.html https://github.com/microsoft/vcpkg.git (Windows) mpdecimal https://www.bytereef.org/mpdecimal/ Java ClassBigInteger https://docs.oracle.com/javase/8/docs/api/java/math/BigInteger.html Usesof Class java.math.BigDecimal https://docs.oracle.com/javase/8/docs/api/java/math/class-use/BigDecimal.html Python Decimal-Arithmetic 15.Floating Point Arithmetic: Issues and Limitations python https://docs.python.org/3/tutorial/floatingpoint.html cdecimal- Python module (2.7 – 3.2) https://www.bytereef.org/mpdecimal/doc/cdecimal/index.html DecimalArithmetic Functions https://learn.microsoft.com/en-us/previous-versions/windows/desktop/automat/decimal-arithmetic-functions?redirectedfrom=MSDN Listof arbitrary-precision arithmetic software https://en.wikipedia.org/wiki/List_of_arbitrary-precision_arithmetic_software IEEE754-2008 revision IEEE 754-2008 revision - Wikipedia | | | | IEEE 754-2008 revision - Wikipedia IEEE 754-2008 (previously known as IEEE 754r) is a revision of the IEEE 754 standard for floating-point arithmet... | | | Justto name two that probably everyone in this area knows, the GNUMultiple Precision Arithmetic Library version 6.3.0 and the MPFRMultiple Precision Floating Point Reliable Library were released in2023. I have no idea which of all these resources would be preferredby the understaffed and overworked GnuCash programmers. Whatcan we do while awaiting a, say, decimal arithmetic or arbitraryprecision arithmetic software or some other excellent solution? Ifthe GnuCash community would like to have Gnucash software match thestatements from the investment firms calculating their holdings orthe members' own records, we could consider making a suggestion whichwould be relatively easy to code. Currently,given the cost of the transaction and the number of shares traded,GnuCash calculates the price per share. On occasion, the Gnucashcalculation results are unexpected. In our example at hand, you find"Logically, $value = $price/share * #shares, and this should beprecise equality. But is possible for a brokerage statement to reportvalues which do not have precise equality. It sounds like FederatedHermes reported $15.00 = $6.26 * 2.396, but the actual $value of this$price and #shares is $14.99896, a difference of $0.00104." Inthis example, if we could allow the user to enter $15.00, we wouldhave a solution, albeit a manual one. GnuCashcalculates $value = $price/share * #shares. A screen showing thosethree results in data-entry fields instead of read-only fields wouldallow the user to change the aberrant result, which could be saved. The computer could be instructed to not re-calculate these threevalues again, until, say, the user changed one of them to null orzero. Such a process is relatively simple to program. It wouldserve the purpose until a perfect solution was developed. Isthe GnuCash community be interested in having the values in GnuCashand the brokerage statements be identical? Ifyou are a member of the GnuCash community, here is an invitation toexpress yourself concerning this topic. Feel free to comment BestRegards, Bruce | | Virus-free.www.avast.com | _______________________________________________ gnucash-user mailing list gnucash-user@gnucash.org To update your subscription preferences or to unsubscribe: https://lists.gnucash.org/mailman/listinfo/gnucash-user ----- Please remember to CC this list on all your replies. You can do this by using Reply-To-List or Reply-All.
