Let's vote for suggestions and bugs
01-17-2020, 08:45 PM (This post was last modified: 01-18-2020 04:45 PM by CyberAngel.)
Post: #101
 CyberAngel Member Posts: 296 Joined: Jul 2018
RE: Let's vote for suggestions and bugs
(01-17-2020 06:36 PM)CyberAngel Wrote:

FP doesn't work in CAS using HP Prime ver A Software Version 2.1.14341 BETA

Looks easy to fix

MS Windows Emulator works

MS Store Production version does not work

Android Free 2.1.14346 CAS 1.5.0 does not work
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The same problems is with IP
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2020 01 16 UPDATE

WINDOWS 10

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CALCULATOR HARDWARE A

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01-19-2020, 06:37 PM (This post was last modified: 05-06-2020 12:44 AM by pschlie.)
Post: #102
 pschlie Junior Member Posts: 1 Joined: Jan 2020
RE: Let's vote for suggestions and bugs
Please consider adding optionally enabled support for inexact saturated over/underflows on HP Prime, which adheres to the following algebra (with N = some positive non-saturated value; and 0, -0, and their reciprocals are considered to represent the smallest or largest saturated representable values respectively (presumably +/-1e-500 & +/-1e+500), such that for multiplicative operations for example log(Inf)/Inf = 500/Inf = 5E-498, not Inf/Inf), and satisfying 1/0=Inf :: 1=0*Inf by default convention; and thereby entering <0><shift><X^-1> enables the entry of Inf):

0 = 0+0 = -0+0 = -N+N = N*0 = N/Inf = -N/-Inf = (or by default convention = 1/Inf)
-0 = -0-0 = 0-0 = N-N = -N*0 = -N/Inf = N/-Inf (or by default convention = -1/Inf)
Inf = 0+Inf = Inf-N = Inf+Inf = Inf-Inf = N/0 = -N/-0 (or by default convention = 1/0)
-Inf = 0-Inf = N-Inf = -Inf-Inf = -Inf+Inf = -N/0 = N/-0 (or by default convention = -1/0)
and thereby:
1 = 0/0 = -0/-0 = Inf/Inf = -Inf/-Inf = 0*Inf = -0*-Inf
-1 = -0/0 = 0/-0 = -Inf/Inf = Inf/-Inf = -0*Inf = 0*-Inf
satisfying X/Y=Z :: Y*Z=X, and further:
ln(0) = log(0) = -Inf
ln(-0) = log(-0) = (-Inf+pi*i)
0^0 = 0^-0 = -0^0 = -0^-0 = 1

(Where the general rule regarding adding a series multiple Inf's or 0's, is that the sign of the first or last such argument respectfully determines the sign of the result, and thereby equations may be structured to yield the under/overflow behavior desired; i.e. for x = Inf; x^3 - x^2 = Inf = 1E500, not 0 = 1e-500; and for x = 0, -0 as the second term is more negative than the first is positive by analogous convention.)

As this would eliminate many common sources of otherwise generally useless error messages needlessly interrupting the use of the calculator in practice, and thereby enable it to become more generally useful and forgiving of otherwise undefined values if 0 was considered to be an absolute-zero, which most often it's not in generalized computations.

---

And as a separate issue, I’d like to see a hybrid numeric format mode supported, where one can define the maximum number of characters which may be displayed, and the number is formatted to display its most precise rounded representation of the value as either a fractional decimal, or in engineering notation, both with digits grouped in powers of 10^3, while the full precision of the value is maintained internally. For example (assuming a fixed width font is used for numeric display, and optionally displaying positive signs to provide format consistency between negative and positive values):

(when a 10 character max is specified, and 123.4567e-12 is entered, the following is displayed when successively multiplied by 10)

+123.5e-12
+1.2346e-6
+12.346e-6
+123.46e-6
+1.2346e-3
+12.346e-3
+0.123_457
+1.234_567
+12.345_67
+123.456_7
+1_234.567
+12_345.67
+123_456.7
+1_234_567
+12.346e+6
+123.46e+6
+1.2346e+9
+12.346e+9
+123.46e+9
+1.235e+12
...

(when a 10 character max is specified, and SQRT(2) is entered, and then successively squared)

+2 SQRT
+1.414_214
+2
+4
+16
+32
...
+8_388_608
+16.777e+6
+33.554e+6
+67.109e+6
+134.22e+6
+268.44e+6
+536.87e+6
+1.0737e+9
...

---

01-21-2020, 07:21 PM
Post: #103
 BryanLarsen Junior Member Posts: 1 Joined: Jan 2020
RE: Let's vote for suggestions and bugs
+1 vote for user soft keys! Such a useful feature...and it seems like it has already been half implemented, then abandoned.
02-18-2020, 12:05 AM
Post: #104
 CyberAngel Member Posts: 296 Joined: Jul 2018
RE: Let's vote for suggestions and bugs
The next Prime should have pogo pins and rails to attach a module
(and akeyboard overlay holders à la HP-41,71).

A student can buy a phone module and
use the calculator as
A] A superior and wonderful feature phone using a cheap module. This module is extremely affordable.
Basically it holds double antennas, dual SIMs and a μSD card plus a chip to handle calls.
B] Buy the more expensive module and get a very poor Android phone, but also Google play. Ask your operator for more details.
C] Custom modules pop up everywhere since the HP expansion port interfacing data is free.
D] Deluxe phone module available in the US from AT&T only. You get it for free when you buy a phone plan.
E] ...
-----------
Plan [B] put the dual antennas in the calculator frame
and lead the signal to the 3x3 pogo grid
Note: Doogee already sells phones that can get extension modules. S90 Pro is extremely versatile. It even offers a walkie-talkie module!
03-28-2020, 01:01 PM (This post was last modified: 03-29-2020 09:21 AM by ramon_ea1gth.)
Post: #105
 ramon_ea1gth Junior Member Posts: 29 Joined: Mar 2020
RE: Let's vote for suggestions and bugs
Suggestion to implement:
[LastCMD] softkey

When touched, [LastMENU] would open the last sequence of menu windows used in the last operation. Then, repeatable operations would be extremely fast (and this applies also to unit conversion).

[LastCMD] would write in the entry line the last executed command in textbook/algebraic mode. In RPN, it would execute immediately the last command (again, thinking in unit conversion, but applies to many other operations).

These [LastMENU] and [LastCMD] softkeys would be located in the entry mode softmenu, as it is now the [Sto>] softkey, both in the CAS menu as in the Home menu, whether in textbook/algebraic mode or RPN mode.

- [LastMENU]: once all the menu windows used last time are opened, it’s easy to go back in the hierarchy with the [Esc] key or the rocker wheel.
- Combined with [LastCMD], repetitive operations are fast.
- The usability of both softkeys would be really close to the traditional HP50g-style persistent soft menu combined with a shortcut (e.g., [LeftShift][unit] for unit conversion in those machines).

I believe this would make a difference in the HP-Prime choose-menu style: I like it, but the main drawback is that all the windows get closed once the operation is selected and it is a problem for repetitive operations.

PS. After coming from an HP 50g, though I was unsure, I am enjoying the RPN entry mode of the Prime. And about the algebraic CAS mode: well, in the HP 50g I was using it writing algebraic expressions!
10-16-2020, 12:41 AM
Post: #106
 CMarangon Member Posts: 84 Joined: Oct 2020
RE: Let's vote for suggestions and bugs
I suggest that the plot of the graphics can be configured for 2, 3 and 4 pixels wide.

Also that HP Prime can be configured so that it can be read in sunlight.

Carlos - Brazil
Time Zone: GMT -3
http://area48.com
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