Relevent to Gui:Acess elements in a result obtained,Conveting from binary to decimal

Question1:

I have a gui which basically does an encryption using AES encryption as follows.

ptext='TRANSFER ONE MILLION DOLLARS FROM STOCKS TO BONDS';
key='AES KEYS ARE SECURE';
ctext=aesencipher(ptext,key,Sbx,f(x),x)

Please don't worry about the above commands. It works out alright in my actual code in the gui. But my problem is as the result of ctext I will obtain something as shown below and then is it possible to access each of its elements as if in a matrix. Usual way to access matrix elements , i.e ctext(2,3) when you need the 3rd element of 2nd row , does not work here. Is there another method ?

ctext=
 Columns 1 through 15

      40   160   254   160   157    64   227    62   199   221   215   116    34   164    99
      65     1   106   251   129    88   115   108    52    13    39   208   218   190   132
      82    28   245   229    60   190   131   229    61   232    15   173     5    91    10

    Column 16

     129
     111
     210

Question2:

A=[56 4 31 5];

how to convert the elements in the above array to binary and store in an array and then again convert to decimal array?

Also is there a way to construct an array where each entry in the above array repeats 3 times. i.e my resulting array should be as

Result=[56 56 56 4 4 4 31 31 31 5 5 5];

Please help me with these two problems

Thanks a lot in advance.

[Walter Roberson]

What happens when you do request ctext(2,3) ?

Answer 1

[Walter Roberson]

Answer for #2:

B = dec2bin(A) - '0'
recovered_A = bin2dec(char(B + '0'))

Answer for #3:

A=[56 4 31 5];
kron(A, [1 1 1])