Effacer les filtres
Effacer les filtres

Partial differentiation-Multiple syms derivative x and y

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vu ngothanh
vu ngothanh le 14 Avr 2015
Commenté : vu ngothanh le 14 Avr 2015
I have a eq. like this y=cosh(L*x)*cos(L*y) (1)
What is the code that I must do if I want to have a result like this: y'=L*x'*sinh(L*x)*cos(L*y)-L*y'*sin(L*y)*cosh(L*x) (2)
I just need a eq.2. I don't know how to call the caculation from 1-2. Sorry about it. Thanks in advance.

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Torsten
Torsten le 14 Avr 2015
syms t, L
x = sym('x(t)'); % x(t)
y = sym('y(t)'); % y(t)
E1 = diff(y);
E2 = cosh(L*x)*cos(L*y);
E3 = diff(E2,t);
pretty(E1)
pretty(E3)
Best wíshes
Torsten.
  1 commentaire
vu ngothanh
vu ngothanh le 14 Avr 2015
Dear Mr. Torsten, Why you put E1 in your code. I don't understand about it. If I remove it, it still give a same result. Thank you

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Plus de réponses (3)

Torsten
Torsten le 14 Avr 2015

vu ngothanh
vu ngothanh le 14 Avr 2015
Thank you for your help. But, your link just solved the diff of x, while I need diff in both x and y. Can you help me again. Thanks a lot

vu ngothanh
vu ngothanh le 14 Avr 2015
Thanks you very much.

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