You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: diffbarytrig.m
    path of file: ./repos/chebfun
    
    the code of the file until where you have to start completion: function d = diffbarytrig(zz, zj, fj, wj, varargin)
%DIFFBARYTRIG  Computes derivative of trigonometric rational function in
%barycentric form.
%   D = DIFFBARYTRIG(ZZ, ZJ, FJ, WJ) returns D (vector of floats), the values of the
%   derivative of a odd trigonometric barycentric rational function with support points ZJ,
%   function values FJ, and barycentric weights WJ evaluated at the points ZZ.

    
function d = diffCot(t,n) % Returns the n-th derivative of Cot evaluated at t
% using derivative polynomials. The t can take arbitrary dimension.

x = tan(t + pi/2);
Psz = [size(x), max(n)+1];
nDim = numel(Psz); % Define the final dimension for summation
P = zeros(Psz); % Initialize derivativ

% Define indices for summations
inds1 = repmat({':'},nDim,1);
inds0 = repmat({1},nDim,1);
inds2 = inds1;
inds3 = inds1;

inds1{nDim}=1;
P(inds1{:}) = -x;

for k = 0:(max(n)-1)
    inds0{numel(Psz)}=k+1;
    l = reshape((0:k)',inds0{:});
    inds1{nDim}=k+2;
    inds2{nDim}=l+1;
    inds3{nDim}=1+k-l;

    P(inds1{:}) = -sum(factorial(k)./(factorial(l).*factorial(k-l)).*P(inds2{:}).*P(inds3{:}),numel(Psz))...
              - heaviside(eps-k);
end