How do I do unsigned comparsion between two vectors having 1s and 0s?

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Nadatimuj 2022-3-29

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评论： Chunru 2022-3-29

x =  '10000001000000000000000000000000'
y =  '00000000000001010110001111000000'

Let's say x is the binary representation of a 32-bit unsigned number. y is also same.

I want to have unsigned comparison between both of them. That means x(1) and y(1) are the MSB and the comparsion should start from there till we reach LSB.

Thanks.

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Answer 1

Chunru 2022-3-29

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https://ww2.mathworks.cn/matlabcentral/answers/1682974-how-do-i-do-unsigned-comparsion-between-two-vectors-having-1s-and-0s#answer_929229

在 MATLAB Online 中打开

x =  '10000001000000000000000000000000'
x = '10000001000000000000000000000000'
y =  '00000000000001010110001111000000'
y = '00000000000001010110001111000000'
% Convert the binary to decimal
xd = bin2dec(x)
xd = 2.1643e+09
yd = bin2dec(y)
yd = 353216
% compare the decimal number
xd > yd
ans = logical
   1

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Nadatimuj 2022-3-29

Thanks. This works well for the 32-bit. Will it work for 64-bit as well?

Chunru 2022-3-29

在 MATLAB Online 中打开

It works forup to 53 binary bits (?).

If you have more bits to compare, you can use symbolic computation:

x =  '0b100000010000000000000000000000001000000000000000000000000011';
y =  '0b000000000000010101100011110000001000000000000000000000000011';
xs = sym(x)
xs = 580964352065011715
ys = sym(y)
ys = 94815832244227
isAlways(xs > ys)
ans = logical
   1