Bit xor of two binary strings and conversion into decimal

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lilly lord 2020-6-19

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https://ww2.mathworks.cn/matlabcentral/answers/551428-bit-xor-of-two-binary-strings-and-conversion-into-decimal

评论： lilly lord 2020-6-21

Hi, I have two large binary strings (e.g 256 bits each), then how to perform bit Xor operation and then convert the answer into decimal number.

str1='11010011110111110000110110111111';
str2='00011111001101011010001111100001';
str3=bitxor(str1,str2);
%%getting error in str3

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lilly lord 2020-6-19

I want to divide the string into 8 bit chunks and need decimal value between 0-255.

James Tursa 2020-6-19

See my edited answer.

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采纳的回答

James Tursa 2020-6-19

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https://ww2.mathworks.cn/matlabcentral/answers/551428-bit-xor-of-two-binary-strings-and-conversion-into-decimal#answer_454402

编辑：James Tursa 2020-6-19

在 MATLAB Online 中打开

The xor part as a logical vector result

result = str1 ~= str2;

Or if you wanted it as char:

str3 = char((str1 ~= str2) + '0');

For 8-bit chunks turned into decimal numbers:

result = 2.^(7:-1:0) * reshape(str1 ~= str2,8,[]);

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James Tursa 2020-6-20

So, can you tell me what exactly you have as inputs (size and class) and what exactly you want as an output (size and class)?

lilly lord 2020-6-21

在 MATLAB Online 中打开

I was workig on random bits generating and try different methods. Your both answer solved my problem . Thanks once again

%%%%Test random bit generation
I=imread('airplane.png');
I2=imresize(I,[128 128]);figure;imshow(I2)
R=I2(:,:,1);G=I2(:,:,2);
R_r=reshape(R,1,[]);
G_row=reshape(G,1,[]);
G_bits=dec2bin(G_row,8);
R_bits=dec2bin(R_r,8);
Red_bits=R_bits(:)';
Gr_bits=G_bits(:)';
%Extract last four bits
R_newbit=R_bits(:,5:end);
R_finabit=R_newbit(:)';
G_newbit=G_bits(:,5:end);
G_finalbit=G_newbit(:)';
s1=length(R_finabit);%check the size of both strings
s2=length(G_finalbit);
%bit Xor g final bit and r final bit and give the answer in dec number
result = 2.^(7:-1:0) * reshape(R_finabit ~= G_finalbit,8,[]);