gradient issue for matlab

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.

Answer 1

[KSSV]

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

[ABDULLA RAHIL]

Hi KSSV,

Thanks for your answer, is it possible by using the equations belwo

FX = gradient(F)

[FX,FY] = gradient(F)

[FX,FY,FZ,...,FN] = gradient(F)

Answer 2

[Image Analyst]

If M is your matrix, have you tried imgradientxy()?

[gx, gy] = imgradientxy(M); % Requires Image Processing Toolbox.