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: bary.m
    path of file: ./repos/chebfun/@chebtech1
    
    the code of the file until where you have to start completion: function fx = bary(x, fvals)
%BARY   Barycentric interpolation on a 1st-kind Chebyshev grid.
%   BARY(X, FVALS) evaluates F(X) using the 2nd form barycentric interpolation
%   formula, where F is the polynomial interpolant on a 1st-kind Chebyshev grid
%   to the values stored in the columns of FVALS. X should be a column vector.
%
%   If size(FVALS, 2) > 1 then BARY returns values in the form [F_1(X), F_2(X),
%   ...], where size(F_k(X)) = size(X).
%
%   Example:
%     xcheb = chebtech1.chebpts(14);
%     fx = 1./( 1 + 25*xcheb.^2 );
%     xx = linspace(-1, 1, 1000);
%     [xx, yy] = meshgrid(xx, xx);
%     ff = bary(xx + 1i*yy, fx);
%     h = surf(xx, yy, 0*xx, angle(-ff));
%     set(h, 'edgealpha', 0)
%     view(0,90), shg
%
% See also CHEBTECH.BARY, CHEBPTS, BARYWTS, FEVAL.

% Copyright 2017 by The University of Oxford and The Chebfun Developers.
% See http://www.chebfun.org/ for Chebfun information.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% This method is basically a wrapper for BARY.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Parse inputs:
n = size(fvals, 1);

% Chebyshev nodes and barycentric weights:
xk = chebtech1.chebpts(n);
vk = chebtech1.barywts(n);


    
function fx = bary(x, fvals)
%BARY   Barycentric interpolation on a 1st-kind Chebyshev grid.
%   BARY(X, FVALS) evaluates F(X) using the 2nd form barycentric interpolation
%   formula, where F is the polynomial interpolant on a 1st-kind Chebyshev grid
%   to the values stored in the columns of FVALS. X should be a column vector.
%
%   If size(FVALS, 2) > 1 then BARY returns values in the form [F_1(X), F_2(X),
%   ...], where size(F_k(X)) = size(X).
%
%   Example:
%     xcheb = chebtech1.chebpts(14);
%     fx = 1./( 1 + 25*xcheb.^2 );
%     xx = linspace(-1, 1, 1000);
%     [xx, yy] = meshgrid(xx, xx);
%     ff = bary(xx + 1i*yy, fx);
%     h = surf(xx, yy, 0*xx, angle(-ff));
%     set(h, 'edgealpha', 0)
%     view(0,90), shg
%
% See also CHEBTECH.BARY, CHEBPTS, BARYWTS, FEVAL.

% Copyright 2017 by The University of Oxford and The Chebfun Developers.
% See http://www.chebfun.org/ for Chebfun information.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% This method is basically a wrapper for BARY.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Parse inputs:
n = size(fvals, 1);

% Chebyshev nodes and barycentric weights:
xk = chebtech1.chebpts(n);
vk = chebtech1.barywts(n);

% Call BARY:
fx = bary(x, fvals, xk, vk);

end