How to sum multiple matrices?

Hello, I 'm new in matlab and I need help please. I have 3 matrix A,B et C. the size of each matrix is 1000*1121. I want to sum the 3 matrix (A+B+C) and save the result in a matrix D (for example : D[1,1]= A[1,1]+B[1,1]+C[1,1]). Please, how can I implement this problem in matlab? and thanks in advance

Answer 1

[pfb]

Product of matrices is "*". Therefore, if they're the same size, D= A*B*C; If instead you want elementwise product, D = A.*B.*C; But all of this is very basic, and explained in the documentation.

[Sahar abdalah]

thanks

Answer 2

[pfb]

Hi

have you tried the following?

 D = A+B+C;

I'm not sure what you mean with the square parentheses. In matlab square parentheses are used to define vectors and matrices, as in

 v = [1 2 3];

or

 M = [1 2; 3 4];

not to access matrix elements. Matrix elements are accessed with A(1,3). Anyway sum and subtraction can be used to sum entire matrices, provided that they have the same sizes.

[Sahar abdalah]

thank you it works for the sum but you have an idea how to make the product of these three matrices?