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When I tried to Laplace transform a differential equation, errors appeared, HELP

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Poojitha Ariyathilaka
Poojitha Ariyathilaka le 10 Avr 2020
Commenté : Poojitha Ariyathilaka le 13 Juin 2020
syms x t s X F
F=laplace('diff(x(t),t,t)+7*diff(x(t),t)+10*x(t)=20',s)
How this transformation could be done otherwise?

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Ameer Hamza
Ameer Hamza le 13 Juin 2020
Modifié(e) : Ameer Hamza le 13 Juin 2020
According to documentation, laplace() accepts symbolic inputs. You should input the symbolic equation
syms x(t) s X F
F = laplace(diff(x(t),t,t)+7*diff(x(t),t)+10*x(t)==20, s)
Also, define syms x(t) as a symbolic function. Defining them seperately will give an error.
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Ameer Hamza
Ameer Hamza le 13 Juin 2020
I am glad to be of help!
My guess is that you have followed a tutorial for an older version. In the past, char arrays were supported for symbolic toolbox functions, now that support is being removed.
Poojitha Ariyathilaka
Poojitha Ariyathilaka le 13 Juin 2020
Yes an older version, thank you!

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