MATLAB: Hi, I have a problem with dividing in Matlab. when I divide to variables m(1)/m(2) it result in integer, but it’s real value is decimal. how can I get the real value

decimaldividedividingintegerMATLABround

clc
clear all
close all
n=5;
x=[0 .25 .5 .75 1];
for i=1:n
    for j=1:n
        if i~=j
            r(j) = x(i)-x(j);
        elseif i==j
            r(j) = 1.000000;
        end
        if j==1
            m(i) = r(j);
        elseif j>1
            m(i) = m(i)*r(j);
        end
    end
end
m(1)/m(2)

Best Answer

but its real value is decimal
Is it now?
  • m(1) is 1 * -1/4 * -1/2 * -3/4 * -1 = 3/32
  • m(2) is 1/4 * 1 * -1/4 * -1/2 * -3/4 = -3/128
  • m(1) / m(2) = 3/32 * -128/3 = -128/32 = -4
Note that a much faster and simpler way to calculate your m would be:
m = prod(x - x' + eye(numel(x)))  %assuming R2016b or later
Related Question