Finding the slope of two consecutive numbers in a matrix

say I have this matrix (j,w)= (3,4)

A =

 [    8    10     2    20
      2     4     5    10
      3     5     0     4]

I want to find the slope between each two consecutive elements in the matrix and save the result in a different matrix B

e.g

B=

 [      f(10)-f(8)/10-8  ,     f(2)-f(10)/10-2 ,    f(20)-f(2)/20-2

       f(4)-f(2)/4-2  ,       f(5)-f(4)/5-4   ,      f(10)-f(5)/10-5 

      f(5)-f(3)/5-3   ,       f(0)-f(5)/0-5   ,      f(4)-f(0)/4-0 ]

f is the sqrt of the number.

I found the gradient function but I am not sure how to use it ..

Answer 1

[Image Analyst]

Does this work:

A =...
  [    8    10     2    20
  2     4     5    10
  3     5     0     4]

squareRootA = A .^ 0.5
num = diff(squareRootA, 1, 2)
den = diff(A, 1, 2)
results = num ./ den

[Image Analyst]

By the way, it's not the slope. I don't know what it is but I know it's not the slope.

[Islam]

yes, I figured later.

Thanks a lot, that helped much