cancel
Showing results for 
Search instead for 
Did you mean: 
huaf
New member
3 2 0 0
Message 1 of 7
1,907
Flag Post

Solved!

Hp Prime Graphing Calculator ilaplace transform issue

HP Recommended
Hp Prime Graphing Calculator
Other

Hello, 

 

I have a problem with the ilaplace transform in my Hp Prime Calculator. When I try to transform something easy like the ilaplace of 1/x ,  the answer should be simple as 1 but in the calculator it shows some number with Dirac(x), when I try to transform other variable its always show Dirac(x).

 

Screen Shot 2018-07-11 at 8.20.57 PM.png

 

Please help!!

0 Kudos
6 REPLIES 6
Tim_Wessman
Level 8
Level 8
747 744 121 187
Message 2 of 7
Flag Post
HP Recommended

Update your calculator and give it a try again. 🙂

TW

Although I work for the HP calculator group as a head developer of the HP Prime, the views and opinions I post here are my own.
0 Kudos
huaf
Author
New member
3 2 0 0
Message 3 of 7
Flag Post
HP Recommended

Already did it, but still the same result. :C

0 Kudos
BartdB
Level 9
971 954 119 186
Message 4 of 7
Flag Post
HP Recommended

Hi,

 

I think you have a value stored in x

 

For symbolic CAS your variables should not have values stored in them.

 

Do the following:

 

purge(x)

 

and try the inverse laplace again.

 

 

-Bart
_________________________________________________________
calculator enthusiast
huaf
Author
New member
3 2 0 0
Message 5 of 7
Flag Post
HP Recommended

It work!! Thank you! 🙂

0 Kudos
Maké
Level 9
3,551 3,490 180 541
Message 6 of 7
Flag Post
HP Recommended
Hi!, @huaf : Important : You must use the calculator in CAS Mode. Inverse Laplace : Returns the inverse Laplace transform of an expression. ilaplace(Expr,[Var],[IlapVar]) Example : ilaplace(1/(x^2+1)^2) ... returns ((-x)*cos(x))/2+1/2 sin(x)
Kind Regards !.
Have a nice day !.
@Maké (Technical Advisor Premium - HP Program Top Contributor).
Provost in HP Spanish Public Forum ... https://h30467.www3.hp.com/
0 Kudos
VPN_777
New member
3 3 0 1
Message 7 of 7
Flag Post
HP Recommended

Use the [HELP] key
ilaplace(Expr,[Var],[IlapVar])

x is the default Var in your Expression
Let's change it to s, but the answer of ilaplace as x

iaplace(1/s^2,s,x)

 

gives   x

Was this what you were asking?

It's helpful to have no value to stored in x 
purge(x) // now x is symbolic instead of a constant
and
no user defined function in the current Application with x

† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation