Convert binary values to a decimal matrix

Hello, Suppose that I have a matrix a= [1 3; 4 2], I convert this matrix to binary format using this code:

    a=magic(2)
    y=dec2bin(a,8)
    e=str2num(y(:))';
The result is :

      y =

    00000001
    00000100
    00000011
    00000010

    e =

    Columns 1 through 17

     0     0     0     0     0     0     0     0     0     0     0     0     0         0     0     0     0

    Columns 18 through 32

     0     0     0     0     1     0     0     0     0     1     1     1     0        1     0

Now when I want to get back my original matrix I inverse the function : s=num2str(e(:))'; r=bin2dec(s)

The results I got is:

    r =

        1082

What can I do to get the orignal matrix? not a number Thank you in advance

Answer 1

[Thorsten]

aback = reshape(bin2dec(num2str(reshape(e, 4, []))), 2, 2);

[Youssra]

that works perfectly ^^. Thank youuuu