Bit wise operation of And and XOR together

Question

Dhruv Bhatnagar 2020-11-21

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https://ww2.mathworks.cn/matlabcentral/answers/655983-bit-wise-operation-of-and-and-xor-together

编辑： Dhruv Bhatnagar 2020-11-24

f10 = 1 + v2 + x2 + x2v2 + x2v3 + x3v2 + x2w2 + x2w3 + x3w2

these are the expressions and I want to perform xor and AND operation on this for 2^8 combination in binary

And if this not correct method then how can I write this expression such that it gives 1bit output as either 0 or 1 for 2^8 combination

function a=Share1(u2,v2,w2,x2,u3,v3,w3,x3) 
a=bitxor(1,v2,x2,bitxor(bitand(x2,v2),bitand(x2,v3),bitand(x3,v2),bitand(x2,w2),bitand(x2,w3),bitand(x3,w2)));
end

But it is not working.

Please someone suggest how can I write this qudratic equation using MATLAB or where I am wrong

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dpb 2020-11-21

Can you explain what the expression as written means?

Mathematically it looks like a simple sum of products of three variables [v,w,x] for two conditions.

Why then write a function with four variables [u,v,w,x] where it appears they correspond to the single/product terms and the result would just be the sum (plus the constant 1) of course?

Certainly seems no reason for bitwise operations here.

Dhruv Bhatnagar 2020-11-22

编辑：Dhruv Bhatnagar 2020-11-22

these two are the expressions and I want to perform xor and AND operation on this for 2^8 combination in binary which results in 1 bit output as either 0 or 1. And then comparing result that (number of 0 == number of 1) or not.

And if this not correct method then how can I write this expression such that it gives 1bit output as either 0 or 1 for 2^8 combination

Thank You.

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Answer 1

Setsuna Yuuki. 2020-11-21

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https://ww2.mathworks.cn/matlabcentral/answers/655983-bit-wise-operation-of-and-and-xor-together#answer_551983

在 MATLAB Online 中打开

The binary operation is between two values logics or values of 0's and 1's. In your code some logics operation are done between three logics values.

For example:

bitxor(bitand(x2,w2),bitand(x2,w3),bitand(x3,w2)) % bitxor(l1,l2,l3)
bitxor(bitxor(bitand(x2,w2),bitand(x2,w3)),bitand(x3,w2)) % bitxor(bitxor(l1,l2),l3)

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Dhruv Bhatnagar 2020-11-22

if it used for 256 inputs then how to apply

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Answer 2

Bruno Luong 2020-11-21

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https://ww2.mathworks.cn/matlabcentral/answers/655983-bit-wise-operation-of-and-and-xor-together#answer_552028

编辑：Bruno Luong 2020-11-21

在 MATLAB Online 中打开

Z=quad(0,1,1,0,1,0,1,1)
function F10 = quad(u2,v2,w2,x2,u3,v3,w3,x3)
% note: u2 and u3 not used anywhere
F10=1+v2+x2+x2*v2+x2*v3+x3*v2+x2*w2+x2*w3+x3*w2;
F10=mod(F10,2);
end