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---+ Editing Assign Modules _Assign_ modules may be added to the flowchart view by dragging and dropping (the same as [[EditingCreateModules][ _Create_ modules]]). Multiple assignments can be done within a single assign module by clicking on the _Add_ button. Previously added assignments can be edited using the _Edit_ button. There are multiple possibilities for assignments: ---++ Variables Variables may be assigned a new value by setting the _Type_ to be =Variable=, the _Variable Name_ to the name of the variable to assign and _New Value_ to the new value of the variable. One dimensional variables may be useful when dealing with arrays, e.g. using different variable values for each day of the week. One dimensional variables may be assigned a new value by setting the _Type_ to be =Variable Array (1D)=, choosing the required _Ro_ of the array and setting the _New Value_. Note that the variable array must be set up (see Editing Variables) with the correct number of rows for the assignment to work correctly. For example, assuming a variable array has been set up with initial values as shown. <img width="560" alt="Values_for_Reception_Start_Times.png" src="%ATTACHURL%/Values_for_Reception_Start_Times.png" height="295" /> To assign a value of 1 to the seventh element in the array we can use the _Assignmen_ a _New Value_ of 1 to _Row_ 7 of our 1D variable. <img width="497" alt="1D_variable.png" src="%ATTACHURL%/1D_variable.png" height="172" /> _Note:_ Row 1 represents Monday, Row 2 represents Tuesday...etc Two dimensional variables may also be useful. They are implemented identically to one dimensional variables (above) except that the user can define the number of rows and the number of columns. A good example of a 2D variable is assigning a roster for when several receptionists must start work each day. This example is shown below. _Note:_ Row 1 represents Monday, Row 2 represents Tuesday...etc _Note:_ Column 1 represents Receptionist 1 (e.g. Mary) , Column 2 represents Receptionist 2 (e.g. Jenny)...etc _Note:_ An entry of =0= on a weekday means that receptionist does not work on that day. <img width="716" alt="2D_Receptionist_Start_Times.png" src="%ATTACHURL%/2D_Receptionist_Start_Times.png" height="295" /> ---++ Attributes Entities can have _Attributes_ assigned to them. There are also some special types of _Attributes_. Examples of _Attributes_ and special types of _Attributes_ are given below based on a medical centre situation. Each _Attribute_ must be named and assigned a specific value. <img width="497" alt="Attribute.png" src="%ATTACHURL%/Attribute.png" height="172" /> _Entity.Type_ is a special kind of _Attribute_ that refers to one of the specific types of entities defined in the model. <img width="497" alt="Entity_Type.png" src="%ATTACHURL%/Entity_Type.png" height="172" /> Entity.Picture is a special kind of _Attribute_ that stores the value of an entity's graphical picture to be used for animations within the Arena model. <img width="497" alt="Entity_Picture.png" src="%ATTACHURL%/Entity_Picture.png" height="172" /> -- Main.MichaelOSullivan - 25 Aug 2009
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Topic revision: r7 - 2010-02-14
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