Gradient of vector-valued function

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Moritz Schulze
Moritz Schulze 2017-10-24
回答： VBBV 2022-12-17
Code below throws an error. How is it possible to get the gradient for a vector-valued function?
syms a b1 b2 t
mfcn = matlabFunction(b1.*t^2+b2.*t, 'Vars', {[b1,b2],t})
gradient(mfcn,t)

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回答（2 个）

Moritz Schulze
Moritz Schulze 2017-10-24
syms a b1 b2 t
mfcn = matlabFunction(b1.*t^2+b2.*t)
gradient(mfcn,t)
This works on the contrary.
VBBV
VBBV 2022-12-17
Ran in:
use diff instead of gradient which is equivalent for gradient operation for symbolic expressions
syms a b1 b2 t
mfcn = matlabFunction(b1.*t.^2+b2.*t,'Vars', {b1,b2,t})
mfcn = function_handle with value:
@(b1,b2,t)b2.*t+b1.*t.^2
diff(mfcn,t) % use diff instead of gradient
ans = 

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