Convert decimal to binary in Matlab?

Question

I am converting base-10 numbers to base-2 numbers, and specifying the number of bits I\'d like to use to represent these base-10 numbers.

Here\'s my code for negative nu

Answer 1

You need to reduce largest num when you put a zero in the output array, because you're essentially starting from a binary array of all ones (ie largestNum). This code worked for me:

if decimal > 0
largestNum = (2^(bits-1))-1;

if decimal > largestNum
    error('%d cannot be represented in %d bits. Increase the number of bits. ',decimal,bits);
    output = '';
end

% first spot must be zero to show it\'s a positive number
output = '0';
bits = bits - 1;

largestNum = largestNum + 1;
num = largestNum;

while num ~= decimal
    num = largestNum - 2^(bits-1);
    if num > decimal
        output = [output,'0'];
        largestNum = largestNum - 2^(bits-1);
    end
    if num <= decimal
        output = [output,'1'];

    end
    bits = bits - 1;
end

while bits ~= 0
    output = [output,'0'];
    bits = bits - 1;
end
end

I'm not sure what this is for, but I would highly recommend using the built in dec2bin to do this.

Answer 2

you can use this script in matlab:

a=[1 2 3 4;-2 -4 3 4;7 8 9 4];

[c,v]=size(a);

n3=c*v;

word_len=5;%with bits of binary  word

data = reshape(a', n3, 1);

databin= fi(data,1,5);

h=bin(databin)%result