I need to sum the values around the perimeter of a matrix, is there sum function in matlab

I assume there is a sum function and attempt the following code:

 [x,y] =size(M)
 Z = M(x:-1:1, y:-1,1);

[DJ V]

make that: [x,y] = size(A); y = sum(A(1,1:1:y))+sum(A(y,1:1:y))+sum(A(2:1:X-1,1))+sum(A(2:1:x-1,y));

[DJ V]

[x,y] = size(A); y = sum(A(1,1:1:y))+sum(A(y,1:1:y))+sum(A(2:1:x-1,1))+sum(A(2:1:x-1,y));

Answer 1

[Daniel kiracofe]

For your second sum, instead of sum(A(y,1:1:y)) think you wanted sum(A(x,1:1:y))

[Vivek Kumar Chouhan]

this code works good for calculating perimeter of matrix of order higher than 2*2 but doesn't work for 2*2 matrix

Answer 2

[Ibrahim Abouemira]

Hello,

Here's a function that performs your required task.

https://www.mathworks.com/matlabcentral/fileexchange/71595-sum-of-values-on-the-perimeter-of-a-matrix