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Operations Research Models and Methods
 
Computation Section
Subunit Markov collection
 - Start/Finish

The figure at the left shows the command menu for the Markov Analysis add-in. The menu is similar to all other add-ins in the Markov collection in that it includes Start and Finish commands.

The Start command creates the Start worksheet illustrated below. The worksheet has buttons to create models from the add-ins in the Markov collection: the Markov Data, Markov Models, Markov Analysis, and Markov Decision Process add-ins. The appropriate add-ins must be installed for the buttons to work.

 
 

A second, a perhaps more important purpose of the add-in regards buttons, user-defined functions, and links. The add-ins place a variety of control buttons on worksheets. Also some worksheets use user-defined functions (functions written by the author and embedded in the add-in code).

The buttons and functions are linked to the computer and the add-in file that created them. This causes error messages regarding links when a workbook created on one computer is opened on another. The Start command deletes all buttons and then recreates all buttons or functions necessary for the worksheets in the workbook. If a workbook containing Markov worksheets is opened and a message regarding links appears, simply cancel the message. Use the Start command to make new buttons and functions with the correct links. If add-ins outside the collection have worksheet buttons, these must be replaced by the associated add-in.

 

It is good practice to always delete buttons and functions that will engender error messages if a workbook is to be opened on another computer. Use the Finish command prior to closing a workbook to delete all buttons and user-defined functions. Note that the buttons are deleted from all worksheets created by an add-in in the Markov collection.

When the buttons and functions are deleted with the Finish command, they are easily replaced with the Start command.

 
  
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by Paul A. Jensen
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