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

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Buddhini Angelika
Buddhini Angelika 2015-12-28
编辑： Walter Roberson 2015-12-28
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.

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回答（1 个）

Walter Roberson
Walter Roberson 2015-12-28
编辑：Walter Roberson 2015-12-28
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])

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