http://edspi31415.blogspot.com/2014/05/scientific-calculator-keyboard-challenge.html,
I have issued a creativity challenge: design a scientific calculator using only 25 keys. No restrictions. I came up with a couple ideas.
Before I present mine, I want to show a great landscape design by Picky Bart. Thanks for posting PickyBart!:
http://pickyb.blogspot.co.uk/2014/05/proposed-scientific-rpn-hp-quickcalc.html
---------------------
The first one is an RPN keystroke programmable calculator:
The next one is a graphing calculator. (or at least an attempt at one). Since only 25 keys are allowed, this prevents the use of an ALPHA key. So, soft keyboards via dialogue had to be implemented instead.
| Modes: | ||||||||||||
| RPN/Linear/Math IO | ||||||||||||
| DEG/RAD/GRAD | ||||||||||||
| FUNC/POLAR/PARAM/SEQN | ||||||||||||
| a+bi, r<q, REALS | ||||||||||||
| BIN/OCT/DEC/HEX | ||||||||||||
| Language (dialogue bar) | ||||||||||||
| Data: Edit, Name, Delete | ||||||||||||
| Stat: n, Means, Sums | ||||||||||||
| Dist: Norm PDF, Norm CDF; iNorm, Bin PDF, Bin CDF, Pois PDF | ||||||||||||
| Pois CDF, Chi PDF; Chi CDF, iChi | ||||||||||||
| List: { }, sum, average, prod; seq, sorta, sortd, augment; | ||||||||||||
| Dchg, size, position | ||||||||||||
| Regr: Vars (a, b, c, r), Regr (Lin, Log, Exp, Pwr, Inv, Quad, Cubic, | ||||||||||||
| Sine) | ||||||||||||
| Matrix: [ ], det, trans, eigen; eigvect, size, position, ref; | ||||||||||||
| rref, spec radius, rank, trace; LQ, LSQ, LU, QR | ||||||||||||
| Prog: | ||||||||||||
| File: New, Edit, Delete | ||||||||||||
| Input: " ", Input, Prompt, Menu | ||||||||||||
| Output: Clear, Display, Output, Graph | ||||||||||||
| Tests: ==, >< , >, >=; <, <=, and, or | ||||||||||||
| IFTE: If, Then, Else, EndIf | ||||||||||||
| Loop: For, Step, Next; Repeat, Until, While, Wend | ||||||||||||
| Ctrl: Pause, Stop, Error, Subr | ||||||||||||
| String: length, sub, left, right; >expr, >string, position, augment | ||||||||||||
| Math: | ||||||||||||
| Frac: PDQ, a b/c, exact, approx | ||||||||||||
| Hyp: (hyperbolic) | ||||||||||||
| Prob: x!, nCr, nPr, gamma; rand, randint, randnorm, dice | ||||||||||||
| Cmplx: abs, arg, real, imag; >Polar, >Rect | ||||||||||||
| Parts: IP, FP, round | ||||||||||||
| Calc: derivative, integral, S, P | ||||||||||||
| Constants: (24) | ||||||||||||
| Conversions: (12 pairs) | ||||||||||||
| Base: | ||||||||||||
| Mark: b, o, h, d | ||||||||||||
| HEX: A, B, C, D; E, F | ||||||||||||
| Logic: and, or, not, xor; xnor, shift right, shift left, 2's | ||||||||||||
| Utility: | ||||||||||||
| RPN: swap, roll down, roll up, drop; over, pick, view, dupn | ||||||||||||
| Solver: New, Edit, Delete, Solve | ||||||||||||
| ALPHA: - enter message and press enter | ||||||||||||
| CAPS
(Keyboard), lower (keyboard), Symb (! @ # $ % ^ & * ( ) { } and math
symbols), Greek I may have forgot something but I think I got all the basics covered. |
||||||||||||