I have 200 by 4 matrix represents thicknesses and need to calculate the corresponding depths (will be also 200 by 4 matrix)

the rows represents the thicknesses and columns represents wells (boreholes).

assuming thicknesses h1, h2, h3, and h4 in first row in thicknesses matrix

then the depths sholuld be z1= h1, z2 = h1+h2, z3 = h1+h2+h3, and z4 = h1+h2+h3+h4 in first row in depth matrix

thanks in advance

Answer 1

[Voss]

% a random 10-by-4 matrix of thicknesses
% each element between 1 and 15:
h = randi(15,10,4)

h = 10×4

1 15 13 11 14 10 9 5 7 3 1 5 12 12 4 11 2 12 14 14 14 14 10 7 9 15 3 5 7 15 7 12 7 1 4 9 3 8 8 7

% depth is cumulative sum along rows of h:
z = cumsum(h,2)

z = 10×4

1 16 29 40 14 24 33 38 7 10 11 16 12 24 28 39 2 14 28 42 14 28 38 45 9 24 27 32 7 22 29 41 7 8 12 21 3 11 19 26

[Moustafa Abedel Fattah]

Thank you very much Mr./Mrs. LEVEL 7 it work very well

[Voss]

You're welcome!

[Torsten]

He/she is Mr./Mrs. _ :-)

[Sam Chak]

Maybe Dr. Underscore. 😄