writing a linspace() function using nargin checks in matlab

main.m
function y = mylinspace(varargin)
%MYLINSPACE Create equally spaced points between two values.
%   Y = MYLINSPACE(X1, X2) generates a row vector Y of 100 equally spaced
%   points between X1 and X2.
%
%   Y = MYLINSPACE(X1, X2, N) generates a row vector Y of N equally spaced
%   points between X1 and X2.
%
%   If X2 is less than X1, then the points are generated in decreasing
%   order.
%
%   The syntax is the same as MATLAB's built-in linspace function.

narginchk(2, 3);
if nargin == 2
    % default number of points
    n = 100;
else
    n = varargin{3};
end
y = linspace(varargin{1}, varargin{2}, n);
end
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