Symb syntax error when pasting from command screen

11252020, 03:29 PM
Post: #1




Symb syntax error when pasting from command screen
One of the more handy things to do with a CAS graphing calculator is to copy a result from the main screen and paste it into graphing equation section and then graph it. This does not seem to work on HP Prime.
For example, let's say I differentiate a poly on the CAS command screen and the result is: 3x^24x+3 and I want to graph it. So, I use copy and then go to the Symb screen and try to paste it in the F1(X)= spot. It won't paste because it gets a syntax error. It turns out that the x's on the CAS command screen are NOT compatible with the Function Symbolic View screen. Is there any workaround on this bug? Thanks! 

11252020, 06:32 PM
(This post was last modified: 11252020 06:33 PM by Han.)
Post: #2




RE: Symb syntax error when pasting from command screen
The lower case x in the CAS view is not the same as the upper case X used by the Function app. When typing in an expression, the Function app expects the formula to use upper case X because it uses the upper case X for its dummy variable. What you can do, however, is use the CAS view to use:
F1:=(x) > x^2; The > is supposed to be the right arrow on the calculator. This stores a function (as opposed to an expression) into F1. The Function app then creates a proper expression from this function using its preferred dummy variable X (upper case). Mathematical functions in the CAS view are created using the ( variables ) > expression syntax. For example, a twovariable function can be created using: f:=(x,y) > x^2+y^2 and typing f(1,2) would produce 5 and typing f(a,b) would produce a^2+b^2 (in the CAS view). Graph 3D  QPI  SolveSys 

09282023, 06:22 AM
Post: #3




RE: Symb syntax error when pasting from command screen
Han,
I sincerely apologize for the extreme lateness of this reply to your response, especially since you responded to my question almost immediately. I very much appreciate your help and for your excellent suggestion  thank you! (11252020 06:32 PM)Han Wrote: The lower case x in the CAS view is not the same as the upper case X used by the Function app. When typing in an expression, the Function app expects the formula to use upper 

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