dividing of binary numbers

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Ganesh 2023-5-22

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评论： Walter Roberson 2023-5-23

See i have a binary code of unknown length , i want to divide it into blocks of length four and assign each block to a variable .

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Ganesh 2023-5-23

It is stored as '101011100'.

It's ike a message that is converted into bits from text or voice or may be image.

Yes, it is encoded into single uint64 number

Walter Roberson 2023-5-23

What do you want to have happen if the character vector is not an exact multiple of 4 long?

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Abhishek 2023-5-22

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Hi Ganesh,

It is my understanding that you are unable to divide a binary data of unknown length into multiple blocks of length four.

To resolve this issue, you may perform bit operations on the binary data to extract last four bits, then store the result in an array and assign each block to a variable.

For your reference, the below example demonstrates a simple approach to divide a binary data of unknown length to multiple blocks:

% register is the variable that stores binary number.
register = 0b1001011010001010101011010101010110000010101111110101010101;
% An Array to store the binary number of length of four.
blockOfLengthFour = [];
% Simple bit operation to extract last four bits and append them to an
% array
while register
     % Get the last four bits
     nextFourBits = bitand(register, 15);
     
     % Append the result to final result array
     blockOfLengthFour = [nextFourBits, blockOfLengthFour];
     
     % remove last four bits of original binary number
     register = bitshift(register, -4);
end
blockOfLengthFour
blockOfLengthFour = 1×15
    2    5   10    2   10   11    5    5    6    0   10   15   13    5    5

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Abhishek 2023-5-22

The last line of provided code gives 15 different values and each of them is greater than single bit.

Ganesh 2023-5-23

Tqs for the answer.

Hey I have another question , after dividing it into blocks i have to assign each block a degree pseudorandomly and based on the degree assigned i have to generate a linear equaton (the coefficients in equation are blocks of message generated ) for each block.

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