Dear Jean-Baptiste,
I'm open to reworking the Fortran and using the Fortran-C binding. Regarding the Libre Office interface, I would argue that this can be simplified to setting up Target cells (any number) returning specified values to be obtained by varying Source-cells (any number). In the optimization, GN would minimize the sum of squares (Target minus specified values, called "residuals"). Note that GN makes use of the residuals themselves, not just the sum of squares. Limiting conditions of the form of less-than or greater-than constraints can be placed on Source cells. The variables in GN are real numbers, so the integer and binary constraints don't apply; however, it would seem in this case that all values of the source cells with these constraints could be checked to find the lowest sum of squares.
Thanks, Guthrie Miller You do not need to translate the Fortran in another language, you could embed it in C/C++ program using Fortran-C binding (ISO_C_BINDING intrinsic module). That said the Fortran code of GN could be improved to make it more portable. I can help if you decide to keep the Fortran code. On 4/19/2020 6:00 AM, libreoffice-requ...@lists.freedesktop.org wrote:
Re: I would like to work with developer to improve solve in Calc (Jean-Baptiste Faure)
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