What would you like to see in a future HP Prime II? (HP Prime², HP Prime 2X)

[BruceH]

I'd quite like to see a way of defining custom alternate number formats.

For example we've previously seen in this forum requests for feet-inch-fraction-of-an-inch input and for degrees+decimal minutes. And there are many others: pounds-shillings-pence; stones+pounds+ounces; miles+furlongs; miles+chains etc etc - all the old non-metric measurements.

Given that there are so many of them (and that many are obscure) it would be nice to have a generic way of defining them rather than have built-ins for every one.

Perhaps an extra menu off the Vars key could bring up the list and they appear as a function e.g define FIF for feet-inch-fraction and see FIF(5,4,3) in an equation. But the difference being that it doesn't get turned into a fraction but remains in that format in the output.

So FIF(1,8,3/10) + FIF(3,6,5/10) = FIF(5,2,8/10) or FIF(5,2,4/5) depending on a flag setting and the flag is defined with the definition.

The definition itself could be created in a specialised app that presents a list of the convert-to and convert-from functions that you create plus exported variables appear as flags that can be set by the user.

The a+b/c key could double-up and be used to swap a value's display form from decimal to alternate (clearly there would need to be some hidden identifier behind the scenes that links the decimal value to the required custom format).

Extra points if the mechanism allows indicators like 1'6+3/16" to indicate feet and inches.