How to Concatenate two matrix's each elements ?

Hi, I am trying to concatenate two matrix's each elements, like following,

A = [ a b c; d e f; g h i] and B = [ 1 2 3; 4 5 6; 7 8 9]

Now i need to create a new matrix like c = [ a1 b2 c3; d4 e5 f6; g7 h8 i9]

Note: here, "a1" is not multiplying 'a' and '1' ( != a * 1). Just concatenating the two elements.

Pls help to do it.

Have a nice day.

- Lenin

Answer 1

[Elias Gule]

Let's try:

syms a b c d e f g h i  % initialize symbols
A = [a b c;d e f;g h i];
B = [1 2 3;4 5 6;7 8 9];
sz = size(A);
C = cell(sz);      % initialize a cell array to hold the concatenated elements

for row = 1 : sz(1)
    for col = 1 : sz(2)
        a = A(row,col);
        b = B(row,col);
        C{row,col} = strcat(a,num2str(b)); % convert B(i,j) to string for concatenation
    end
end

[Lenin chakravarthy Kuppannan]

Hi, Thank you for your help. your program works very well. I modified your program little to meet my objective.

My objective is to create a new matrix num_mat = [111 222 333; 444 555 666; 777 888 999] by concatenating the following matrix A = [1 2 3; 4 5 6; 7 8 9] and B = [11 22 33; 44 55 66; 77 88 99].

Note: A,B & num_mat matrix are numbers.

Here the output 'num_mat's elements need to be numbers, not strings.

So i wrote a program with your program as base as following, kindly see the attachment.

- Kindly hep me to solve this problem.

Have a good day.

- Lenin

[Elias Gule]

Ola!

Thanks, your example matrices just made my life easy. Try the following code:

C = arrayfun(@(x,y) str2double(strcat(num2str(x),num2str(y))),A,B)

where A and B are numerical matrices of the same size.

Answer 2

[Andrei Bobrov]

A = [ 1 2 3; 4 5 6; 7 8 9];
B = [ 1 2 3; 4 5 6; 7 8 9];

str2double(strcat(arrayfun(@num2str,A,'un',0),arrayfun(@num2str,B,'un',0)))