Example - data input GUI

GUI function to allow a user to enter text or numerical data into text
fields and is outputed as a structured array. Which can be be used in
another m file or function. This GUI is designed for the breathing data
collected in PRBS or Read studies. It asks for a data set collected for a
subject, an identifier for when or how the set was collected, the
subjects initials, a study or subject identifier and asks whether the
graphs should be printed and closed as they appear. It then checks
whether the raw data file is located in the file named data on drive G:\
and if other fields have not been filled the cell will exist, but contain
spaces. If the quit button is pushed the GUI closes and returns to the
calling function where the proper errors are given. It was created by
Henry Ford Research Engineer Dawn Sanzi with the help of Matlabs
Application Support Engineer Sean Geary.