MATLAB: Can rem function be used for binary variables

binaryrem

b = 0; c = dec2bin(b,4); d = rem(c,10);

The answer is d = 8 8 8 8

Can anyone please explain the reason why it is giving such an output and how?

Best Answer

dec2bin does not generate a number, but a string. You're calculating the remainder of the ascii code of the characters '0' and '1' divided by the decimal 10 (and not binary 10 == decimal 2).

The only numeric representation that matlab understands is decimal. All other representations use strings. Numerical operations applied to strings use the ascii code of the characters.

The closest you could come to the result you want would be:

b = 0;
d = dec2bin(rem(b, bin2dec('10'))

Related Solutions

MATLAB: How to convert a string to binary and then from the binary back to string

binary = reshape(dec2bin(s, 8).'-'0',1,[])
str = char(bin2dec(reshape(char(binary+'0'), 8,[]).'))

MATLAB: How to convert an array of binary values into the corresponding decimal number within MATLAB

You can convert the array to a decimal number by first converting it into a binary string, then using the BIN2DEC function to convert the string into a number:

x = [1 0 0 0 0 0 0 0];
% convert x to a string array
str_x = num2str(x);
% remove the spaces in the string, so it 
% becomes '10000000'
str_x(isspace(str_x)) = '';
% now use BIN2DEC to convert the binary 
% string to a decimal number
y = bin2dec(str_x);

For MATLAB 7.0 (R14) and releases after that, BIN2DEC ignores any space (' ')

characters in the input string. Hence, the following step is not required in the above code:

str_x(isspace(str_x)) = '';

Please note that the BIN2DEC function works with strings of size less than 52 bits.

To convert a binary string with more than 52 bits, you would need to use the symbolic Math Toolbox in MATLAB.

For example, a binary string can be converted using the text2int function in MATLAB 7.8 (R2009a).

z = evalin(symengine,'text2int("1111000101111100010111110001011111000001011111000101010",2)')

Best Answer

Related Solutions

MATLAB: How to convert a string to binary and then from the binary back to string

MATLAB: How to convert an array of binary values into the corresponding decimal number within MATLAB

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