====== Tutorial 2 - Creating compartments ======


===== 2/7 =====

This lesson will teach you how to create [[Compartment|Compartment]] blocks, and how to connect them with [[Transfer|Transfer]] blocks.

The two state variables //C<sub>water</sub>// and //C<sub>fish</sub>// (the mass of the contaminant in water and fish resp.) are modelled with [[Compartment|Compartment]] blocks.

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**Creating a project**

  - Create a new project by clicking the {{:New24.png|New}} button on the [[Menu_bar#Toolbar|toolbar]] or by selecting **File | New** from the [[Menu_bar|Menu bar]].
  - Make sure that the [[Modeling_layout|Modeling layout]] is visible by clicking the {{:MatrixView24.png}} Modelling button on the [[Menu_bar#Toolbar|toolbar]].

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**Creating the Water compartment**

  - Make sure that the [[Matrix_window|Matrix window]] is opened by selecting **Window | Matrix** from the [[Menu_bar|Menu bar]].
  - Right-click the first diagonal element in the [[Interaction_matrix|Interaction matrix]]. Select **Compartment** from the pop-up menu.
  - Double-click the [[Compartment|Compartment]], or right-click it and select **Edit** from the pop-up menu.
  - Make sure that the **Properties** tab is selected
    * Enter “Water” in the **Name** field.
    * Enter “Mass in water” in the **Full Name** field.
  - Select the **Apperance** tab.
    * Click the **Image** button. Select “Media | Water.jpg”.
  - Select the **Values** tab. In the table, write //“100”// in the **Initial Condition** column.
  - Close the edit window by clicking **Ok**

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**Creating the Fish compartment**

  - Right-click the second diagonal element in the [[Interaction_matrix|Interaction matrix]]. Select **Compartment** from the pop-up menu.
  - Double-click the second [[Compartment|Compartment]], or right-click it and select **Edit** from the pop-up menu.
  - Select the **Properties** tab
    * Enter “Fish” in the **Name** field.
    * Enter “Mass in fish” in the **Full Name** field.
  - Select the **Apperance** tab.
    * Click the **Image** button. Select “Fauna | Fish.jpg”.
  - The initial condition for //Fish// is 0 by default, so you do not need to enter anything in the **Values** tab.
  - Close the edit window by clicking **Ok**

{{tutorial_compartment.png}}
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**Next**

  * [[Tutorial_2-Creating_transfers|Creating transfers (3/7)]]

**Previous**

  * [[Tutorial_2-Creating_a_compartment_model|Creating a compartment model (1/7)]]

**References**

  * [[Tutorials|Back to Tutorials]]
  * [[start|Home]]