Added matlab code samples.

All of these code samples currently are mis-identified in my repositories. I'm
donating them to the cause.

samples/Matlab/varargin_to_structure.m

@@ -0,0 +1,37 @@
+function options = varargin_to_structure(arguments)
+% function options = varargin_to_structure(arguments)
+% Returns a structure from a cell array of pairs.
+%
+% Parameters
+% ----------
+% arguments : cell array (1, n)
+%   A cell array where n is an even number greater than or equal to 2. The odd
+%   cells must be a character string and the even cells can be any data type.
+%
+% Returns
+% -------
+% options : structure
+%   The fields of the structure correspond to the odd cells in the array and
+%   the value for that field corresponds to the even cells.
+%
+% This is useful for functions that have varargin as an input where the
+% variable inputs are keyword pairs.
+
+% make sure there are enough arguments
+if length(arguments) <= 1
+    error('Please supply 2 or more arguments')
+end
+
+% make sure they provided and even number of inputs
+if mod(length(arguments), 2) ~= 0
+    error('There must be an even numbers of arguments')
+end
+
+% store the values in the structure
+for i = 1:2:length(arguments)
+    % make sure they have character strings as all the odd cells
+    if ~ischar(arguments{i})
+        error('The odd arguments must be character strings.')
+    end
+    options.(arguments{i}) = arguments{i + 1};
+end