MATLAB: Finding the slope of two consecutive numbers in a matrix

slope

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 ..

Best Answer

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
Related Question