solved

Yeah thanks for the firmware link, I'll have to see what mine is. So far the graphing utility is helping out, like graphing decaying sine waves for circuits. So far it is a lot easier to graph stuff in this than say Octave GNU. I'll have to check out the PC HP Prime version, sometimes that should be better to use than the calc. But yeah no regrets about buying this, I can far more easily compare LTspice sims to my calculated functions for once.

And it's very fast.

skip to bottom post...seems to be battery problem ?

I dabble a bit with GNU octave on PC, but I most of the math I do is on a scientific calc, or by hand. My calc can do 3rd degree polynomials, and 3x3 matrices, but only with real numbers.

I would like to be able to solve some higher order matrices w/ complex numbers, or find Eigenvectors, on a calc. It would be nice to solve some ODE's on a calc too, and plot stuff like that, without needing to learn code every time.

And what about tablet's, are they making super graphing calculator's the size of tablets ? Or can you get tablets that would run all the common PC programs ?

I'm just watching a few overview videos

IDK if LTSpice has an easy way to plot ideal models, or equations. But too often, IDK if my answers are off, or if the sim is just doing something more complicated than my equations. But I like how in LTSpice you can plot something and then drag cursors around. I hope I can do that in GNU octave too.

Whats a more user friendly math program, that does plots and solves ODE's, without needing so much coding ? I guess there's not that much to doing systems of 1st orders equations, I've done it before. But if I had a simpler program, that was more point and click, I'd use it.

Either way I should get a gfx calc., any recommendations ?