View difference between Paste ID: n1DG6nUv and SyMPsUJS

-function [ cos ] = cosine( x, n )
+function [ fcos ] = cosine( x, n )
 %Cosine Provides the cosine (cos x) of the input
 %   cosine(x) takes a matrices of values (in radians) and outputs a
 %   matrices containing an approximate cosine of each value in the matrix.
 %
 %   cosine(x) takes a matrices 'x' and returns the cosines. Tbe default
 %   number of values in the series is 10.
 %   cosine(x) takes a matrices 'x' and 'n', the number of values in the
 %   series, and returns a matrices of the cosines of 'x'.
 if (nargin < 2)  ||  isempty(n)
         n = 10;
 end
 validateattributes(x, {'numeric'}, {'finite', 'real', 'finite'});
 validateattributes(n, {'numeric'}, {'integer', 'scalar', 'finite', 'positive'});
 [columns, rows] = size(x);
 fcos = zeros(columns,rows);
 for i = 1:numel(x)
-    cos(i) = (sum(((-1).^(0:n)).*(x(i).^(2*(0:n)))./(factorial(2*(0:n)))));
+    fcos(i) = (sum(((-1).^(0:n)).*(x(i).^(2*(0:n)))./(factorial(2*(0:n)))));
 end
-if numel(cos)~=numel(x)
+if numel(fcos)~=numel(x)
     error('cosine:inputoutputmismatch','The output matrix is smaller than the input matrix')
 end