
On Apr 30, 2018, at 7:11 AM, Gavin Wraith <gavin@wra1th.plus.com> wrote:
Using while do loop is a bad idea, as it can easily get into infinite loop. It would be better if the solver "giveup" if it cannot converge within some maximum iterations. Another problem is the df function. A symbolic df function may be hard to get (or messy) Even the f function may be hard to get. Most engineering problem involve simultaneous system of equations, which were hard to simplify into a single f It is much easier using, say TK solver, instead of Lua. Instead of a bunch of equations for solving different variable, Just leave the input field(s) blank (or guess values), and type ! Excel spreadsheet solver is another option. 