HP calculator with largest math (stats, logic, etc..) and data structure functions

[JSBach]

(09-22-2018 10:32 PM)Valentin Albillo Wrote:  

Quote:Counterexamples can also greatly help. [...] Or "the 15c could do that, the 42S couldn't".

There are some relevant things the 15C can do which the 42S can't. Just for instance, the HP-15C has a parallel 4-level complex stack so you can enter 4 complex numbers on the stack using just the stack. You can't do that in the HP42S.

The HP-15 had 2 parallel stacks, one for the real parts and one for the imaginary parts.
The HP-42 had something better: Every stack member could be a real or a complex number.
(Conversion (x,y) <-> y+i*x: the "COMPLEX" function)

The HP-42S system is IMO much easier to use. (The same goes for matrix functions, solver and integrals.)

JSBach