Finding gradient in MATLAB

2 次查看（过去 30 天）
Ba Ba Black Sheep!
编辑： Star Strider 2017-1-4
If the gradient of
100*(y - x^2)^2 + (1 - x)^2
is,
[-400*(y - x^2)*x - 2*(1 - x); 200*(y - x^2)]
what would be the gradient of
(1 - x + a)^2 + 100*(y - b - (x-a)^2)^2;

请先登录，再回答此问题。

采纳的回答

Star Strider
Star Strider 2017-1-4
编辑：Star Strider 2017-1-4
syms a b x y
J = jacobian( (1 - x + a)^2 + 100*(y - b - (x-a)^2)^2, [x,y])
G = gradient( (1 - x + a)^2 + 100*(y - b - (x-a)^2)^2, [x,y])
J =
[ 2*x - 2*a - 200*(2*a - 2*x)*(b - y + (a - x)^2) - 2, 200*y - 200*b - 200*(a - x)^2]
G =
2*x - 2*a - 200*(2*a - 2*x)*(b - y + (a - x)^2) - 2
200*y - 200*b - 200*(a - x)^2

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Get Started with Optimization Toolbox 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by