MATLAB: Unable to get the diagonal matrix from an equation

MATLAB

I want to show the values of mu1 in the form of diagonal matrix but by using the command disp(diag(mu1))i am unable to get the desired diagonal matrix, kindly assist.
clc; clear all
format rat
syms N
N=3;
i=[0:N];
for t = i/N
    mu1  = 1/2 *exp((1/2) *t);
  disp(diag(mu1))
end
my desired answer is:
      1/2            0              0              0       
       0            469/794          0              0       
       0              0            986/1413         0       
       0              0              0           1225/1486

Best Answer

format rat
syms N
N=3;
i=[0:N];
mu1  = 1/2 *exp((1/2).*(i/N));
disp(diag(mu1))
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