How to do quick calculations for single-variable expression for complex-valued input?
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11-12-2018, 08:40 PM
(This post was last modified: 11-12-2018 08:41 PM by rushfan.)
Post: #1
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How to do quick calculations for single-variable expression for complex-valued 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 single-variable expression for a complex valued input? The numeric app, both the function and the advanced functions, set to "BuildYourOwn", does not accept complex-valued 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 single-variable expression at a complex-valued input. Casio Example, complex mode, 2 button presses to evaluate expression: 1. type x^2+1 2. press "Calc" 3. type 2i 4. press "=" |
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11-12-2018, 10:02 PM
Post: #2
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RE: How to do quick calculations for single-variable expression for complex-valued 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 |
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11-13-2018, 12:21 AM
(This post was last modified: 11-13-2018 12:34 AM by ijabbott.)
Post: #3
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How to do quick calculations for single-variable expression for complex-valued 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 |
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11-13-2018, 03:59 AM
Post: #4
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How to do quick calculations for single-variable expression for complex-valued 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+1|x = 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? |
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11-13-2018, 08:22 AM
Post: #5
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RE: How to do quick calculations for single-variable expression for complex-valued input?
(11-13-2018 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 |
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11-13-2018, 01:59 PM
(This post was last modified: 11-13-2018 02:03 PM by rushfan.)
Post: #6
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RE: How to do quick calculations for single-variable expression for complex-valued input?
(11-12-2018 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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