How to implement the following formula in MATLAB?

E=summation summation summation v^2(x,y,z)

where x, y and z are the limits of summation respectively. V is a 208x176x176 matrix .

Any help is appreciated. Thanks

Answer 1

[Rohit Kudva]

Hi,

I am assuming that you want to sum up all elements of 'V^2' where V is a 3D matrix. You can implement it using the sum function as follows:

>> sum(sum(sum(V.^2)));

'V.^2' computes element-wise square for each element in matrix 'V'. The above line of code will return a single scalar value which is the sum of all elements in 'V.^2' 3D matrix. You can replace 'V.^2' in the above line of code by the expression 'V.*V'.

I hope this answers helps you.

- Rohit

Answer 2

[Image Analyst]

You don't need to call sum() three times. Simply try this:

E = sum(V(:).^2);