How to make a binary sequence bit with given key?

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Pham Ngoc Thanh
Pham Ngoc Thanh 2013-8-22
Hi I have a key (ex: key=1234;) how i create a binary sequence bit whose length is 1000 with this key?

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Walter Roberson
Walter Roberson 2013-8-22
Convert the key to binary. repmat() that as many times as will fit in a vector of length 1000. Fill the remainder of the 1000 with binary 0's.
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Pham Ngoc Thanh
Pham Ngoc Thanh 2013-8-23
dear Walter Roberdon Thank for your help but now i have a proplem, please help me again
i have
key = 1234;
bit_sequence = dec2bin(key);
how i convert bit_sequence = 10011010010 to A = [1 0 0 1 1 0 1 0 0 1 0]
Walter Roberson
Walter Roberson 2013-8-23
Do you mean Ӓ, capital A with two dots, Unicode position (decimal) 1234 ? Or do you mean just capital A ?
If you mean Ӓ, capital A with two dots then
vec = [1 0 0 1 1 0 1 0 0 1 0]; %you have the vector somehow
char(bin2dec(char('0' + vec)))
and the reverse would be
ch = char(1234); %you already have the character somehow
dec2bin(ch) - '0'

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