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/load_data.m

@@ -0,0 +1,33 @@
+function data = load_data(filename, varargin)
+% function data = load_data(filename, varargin)
+%
+% Returns an iddata object with the input thetac and output theta for the
+% given file.
+%
+% Parameters
+% ----------
+% filename : char
+%   Filename for the data file.
+% varargin : char value pairs, optional
+%   sampleTime : double, default=0.0005
+%   detread : boolean, default=true
+%   directory : char, default='data'
+
+parser = inputParser;
+parser.addRequired('filename');
+parser.addParamValue('sampleTime', 0.0005);
+parser.addParamValue('detrend', true);
+parser.addParamValue('directory', 'data');
+parser.parse(filename, varargin{:});
+args = parser.Results;
+
+raw = load([args.directory filesep filename]);
+
+data = iddata(raw.theta, raw.theta_c, args.sampleTime, ...
+             'InterSample', 'foh', ...
+             'InputName', {'thetac'}, ...
+             'OutputName', {'theta'});
+
+if args.detrend
+    data = detrend(data);
+end