Calculating gradient of f in point A?
20 views (last 30 days)
Show older comments
ABCDEFG HIJKLMN
on 22 Nov 2021
Commented: Star Strider
on 22 Nov 2021
Hello! I am trying to calculate the gradient of a function in a point, but I can't seem to do it.
I have calculated the gradient through the functions diff and gradient. Now I am trying to replace x1 and x2 by 5 and 6, respectively, to calculate the gradient in this point (called A) through any of the gradient functions, but MATLAB does not allow it.
Any help? Thanks in advance!
syms x1 x2
f = x1 + x2^2;
A = [5, 6];
f_grad_diff = [diff(f, x1), diff(f, x2)];
f_grad_gradient = gradient(f);
0 Comments
Accepted Answer
Star Strider
on 22 Nov 2021
Create them as functions —
syms x1 x2
f = x1 + x2^2;
A = [5, 6];
f_grad_diff(x1,x2) = [diff(f, x1), diff(f, x2)];
f_grad_gradient(x1,x2) = gradient(f);
x1s = sym(5);
x2s = sym(6);
diff_evaluated = f_grad_diff(x1s,x2s)
gradient_evaluated = f_grad_gradient(x1s,x2s)
Are these the desired results?
.
2 Comments
More Answers (0)
See Also
Categories
Find more on Loops and Conditional Statements in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!