Help in choosing a new calculator

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(09-20-2016 09:27 AM)bhennink Wrote:  Mi Marco,
This did the trick.

I missed the quotes. When I put them around the equation it works

I searched for this in the manual but could not find it there
I went trough the PDF in the chapter about solver but there was no discription how to store and I got lost in the chapter about storing Variables

Also the equation writer (EQW key or down arrow for equations in stack level 1) is a handy tool for more complex equations you need / want to type in algebraic format. It works in algebraic (RPN/ALG setting doesn't matter) so you do not need any '-marks there, it also have a few handy features like simplification, evaluation and factorising all of them can be done for specific parts of equation IIRC.

It does have pretty steep learning curve, note also that the CAS system separates the numbers differently in exact mode if the number do have dot in the end like 100. in your "exact" equation will turn it as approx equation and you always get floating answer. This is one trap for new players.

Also if you do program in approx mode the numbers in the program source are turned to approximated values (dot added at the end) when the program is pushed to the stack to wait to be storaged, something that can cause a much frustration until you figure out what is causing the "problem".

Same approx behaviour goes with the symbolic solver, if you enter equation (just an example) F=0.5*m*v^2 and try to solve the m it solves it as aproximated and simplified answer and doesn't give you that made in paper style visual format (which you were expecting because you did set the calculator to "exact symbolic answers" mode ) while answer is correct it is sometimes handy to get the calculator turn the values around for you to double check (or for those days when head is pool of jelly) your work in paper or in somewhere else.

Also one feature to test out are the units system in this family of HP calcs. Don't ask how to attach them to your own equations, because I have no idea.

It seems that you are also after some electorics compononent and design calculations, I suggest you take a look for the set of programs one gentleman in Maxim Integrated (can be found atleast at hpcalc.org or https://www.maximintegrated.com/en/desig...ors/hp50g/) have written for 50g.

PS. You are correct 35s is step backwards (in many ways) from earlier top-line models of HPs non-graphing calcs. Which is sad since in business models there still are models (ie. 17bII+) using many of those (UI & management) features with reduced suitability engineering and science because of lack of scientific&engineering features (excluding the business calculus).