matlab function
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First I write a function as follow:
syms x y z
f = [x*y*z; y; x + z];
v = [x, y, z];
R = jacobian(f, v);
As just you said, to get the value of R at the particular value of x,y,z, I can use
subs(R,[x,y,z],{1,2,3});
However, if z is a vector, and I want to compute the each value of R by using each element of z and the value of x,y, hence, I made a loop as follow:
%Consider x=1;y=2;z=[1 2 3];
for i = 1:size(z)
t = z(i);
R(:,:,i)=subs(R,[x,y,z],{1,2,t});
end
however, it doesn't work, because t can not be instead by each value in vector z, what shall I do on this?
Thank you very much!
1 个评论
Oleg Komarov
2012-3-26
Please format your question: http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup
采纳的回答
Andrei Bobrov
2012-3-27
syms x y z
f = [x*y*z; y; x + z];
v = [x, y, z];
R = jacobian(f, v);
t = 1:3;
Out = zeros([size(R),numel(t)]);
for j1 = 1:numel(t)
Out(:,:,j1) = subs(R,[x y z],[1 2 t(j1)]);
end
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2012-3-26
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