How to simply differentiate equations?
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I have defined an equation V(x,t), can i store the second derivitive of this equation in a new equation?
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Accepted Answer
Wayne King
on 24 Apr 2013
Edited: Wayne King
on 24 Apr 2013
Do you have the Symbolic Toolbox?
syms x t;
v = cos(x)*sin(t);
d2v_dx2 = diff(v,'x',2);
d2v_dx2 has class sym
2 Comments
Wayne King
on 24 Apr 2013
Edited: Wayne King
on 24 Apr 2013
use subs() for example, to leave t alone and put in pi for the x variable
subs(d2v_dx2,[x,t],[pi,t])
or to substitute for both variables
subs(d2v_dx2,[x,t],[pi,pi/2])
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