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Hi i have questions " i want function like unit 64 but generate 56 bit"

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ghibeche
ghibeche 2022-12-30
评论： ghibeche 2022-12-30
Hi i have questions " i want function like unit 64 but generate 56 bit"
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John D'Errico
John D'Errico 2022-12-30
Ran in:
Sorry, but there is no uint56 data type in MATLAB. Could you create one? Well yes. But then you would also need to program ALL interactions with that datatype. How to add, subtract, multiply, divide, display the numbers, etc.
Far better to just use uint64.
What the code you wrote is suposed to do, I am not at all sure. Are you trying to extract the bits? For example...
N = uint64(17)^12
N = uint64 582622237229761
log2(double(N))
ans = 49.0496
This is an integer smaller than 2^56, since the log base 2 is approximately 49.
And dec2bin can extract the desired 56 bits. There are leading zero bits, but that is what you want.
dec2bin(N,56)
ans = '00000010000100011110010001001111011111010000001011000001'

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