How to do quick calculations for singlevariable expression for complexvalued input?

11122018, 08:40 PM
(This post was last modified: 11122018 08:41 PM by rushfan.)
Post: #1




How to do quick calculations for singlevariable expression for complexvalued input?
In my casio scientific calculator, when I'm in complex mode, I can make an expression using the variable x, and then I press the "Calc" button and it will replace x by an input, which can be complex.
In the HP Prime, is there any way where I can quickly calculate the value of a singlevariable expression for a complex valued input? The numeric app, both the function and the advanced functions, set to "BuildYourOwn", does not accept complexvalued inputs. Despite the alleged purpose of the Home mode, which is to do numeric calculations, there is no way to quickly and conveniently evaluate a singlevariable expression at a complexvalued input. Casio Example, complex mode, 2 button presses to evaluate expression: 1. type x^2+1 2. press "Calc" 3. type 2i 4. press "=" 

11122018, 10:02 PM
Post: #2




RE: How to do quick calculations for singlevariable expression for complexvalued input?
Open Function App
type your single variable in. say F1 @HOME or CAS type F1(2i); F1({1,2,3,3+3i, 4i}) to build a table 

11132018, 12:21 AM
(This post was last modified: 11132018 12:34 AM by ijabbott.)
Post: #3




How to do quick calculations for singlevariable expression for complexvalued input?
You can use 'subst' in CAS mode: subst(x^2+1,x=2i)
CAS mode is appropriate here because you're doing an algebraic operation. — Ian Abbott 

11132018, 03:59 AM
Post: #4




How to do quick calculations for singlevariable expression for complexvalued input?
The quickest way to evaluate an expression at a value is to use the vertical bar "where" function, i.e. where x = some value.
x^2+1x = 2*i The vertical bar is found on the top row of the templates. On the virtual calculator, just use the vertical bar (pipe) key. Is this what you had in mind? 

11132018, 08:22 AM
Post: #5




RE: How to do quick calculations for singlevariable expression for complexvalued input?
(11132018 03:59 AM)Wes Loewer Wrote: The quickest way to evaluate an expression at a value is to use the vertical bar "where" function, i.e. where x = some value. Good idea! That's what I'd use on the TI CAS calculators (where it is called the "with" operator), but I forgot it existed on the Prime. — Ian Abbott 

11132018, 01:59 PM
(This post was last modified: 11132018 02:03 PM by rushfan.)
Post: #6




RE: How to do quick calculations for singlevariable expression for complexvalued input?
(11122018 10:02 PM)toshk Wrote: Open Function App That is what I was looking for. Slightly clunkier than what I was used to in the CASIO. The numeric mode should support displaying tables of complex valued outluts, and so should plotting, as well. Is there a way to set the unused touch menus @home or @cas to custom functions in the HP Prime? Most of the touch row is completely unused when typing, I can think of a lot of useful things that could be put there. 

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