MATLAB: Return the numerator and denimentor

denomenatornumeratorratio

Hi everyone

Is there such a way to return the numerator and the denomenator of a given rational number

for example x = 1/2

I want to get n=1 , d=2

Best Answer

Rat gives rational results for a floating point number, sometimes they are only approximate, of course.

[n,d] = rat(1/2)
n =
     1
d =
     2
     
[n,d] = rat(pi)
n =
   355
d =
   113

Related Solutions

MATLAB: For given Decimal number, calculate possible fractions

max_denom = 12345;        %what is the largest denominator you permit?
[n, d] = rat(TheNumber);
iters = 1 : floor(max_denom/d);
frac_numerator = n .* iters;
frac_denoms = d .* iters;

There is a slight bit more of a challenge if the numerator or the denominator have to be "round" numbers, with the degree of challenge depending upon the rules of which "round" numbers are permitted.

MATLAB: Hi everyone, I want to find the polynomials from root. I want to get a value without decimal, how is that possible? Please find the example below for more clarification.

>> V = poly([ -0.1667 + 1.2802i -0.1667 - 1.2802i])
V =
            1       0.3334       1.6667
>> [N,D] = rat(V,0.001) % get numerator and denominator
N =
     1     1     5
D =
     1     3     3
>> N = prod(D).*N./D % convert all to same denominator
N =
     9     3    15
>> d=N(1); for k=N(2:end), d=gcd(d,k); end % find GCD
>> N = N./d % divide by GCD
N =
     3     1     5

Best Answer

Related Solutions

MATLAB: For given Decimal number, calculate possible fractions

MATLAB: Hi everyone, I want to find the polynomials from root. I want to get a value without decimal, how is that possible? Please find the example below for more clarification.

Related Question