gradient issue for matlab
显示 更早的评论
Hi
I am trying to use the gradient function to have dq/dv and dv /dq . The martix has one direction is q and one is v but without titles for each one. My matrix size is 47 rows and 2 column.
采纳的回答
Let A be your 47X2 matrix.
q = A(:,1) ;
v = A(:,2) ;
dq_dv = diff(q)./diff(v) ; % dq/dv
dv_dq = diff(v)./diff(q) ; % dv/dq
更多回答（1 个）
Image Analyst
2019-4-24
If M is your matrix, have you tried imgradientxy()?
[gx, gy] = imgradientxy(M); % Requires Image Processing Toolbox.
类别
在 帮助中心 和 File Exchange 中查找有关 Sparse Matrices 的更多信息
产品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
