GRAD

3 次查看（过去 30 天）

显示更早的评论

x 2011-9-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/15238-grad

GRADIENT:

(∇y)(x1i, x2j)=[∂y/∂x1(x1i,x2j), ∂y/∂x2(x1i,x2j)]

HOW TO IMPLEMENT THIS EQUATION

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Fangjun Jiang 2011-9-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/15238-grad#answer_20668

在 MATLAB Online 中打开

For numerical analysis,

>> help gradient
 GRADIENT Approximate gradient.
    [FX,FY] = GRADIENT(F) returns the numerical gradient of the
    matrix F. FX corresponds to dF/dx, the differences in x (horizontal) 
    direction. FY corresponds to dF/dy, the differences in y (vertical) 
    direction. The spacing between points in each direction is assumed to 
    be one. When F is a vector, DF = GRADIENT(F)is the 1-D gradient.