This lesson will teach you how to vectorize parameters, of Index lists and how to assign index-specific data.

The two parameters of the model control the uptake rate and the excretion rate of the fish. These coefficients are typically substance dependent.

Converting a parameter to a vector

1. Open the Blocks window by selecting Window | Blocks from the menu bar.
2. Right-click the k_uptake parameter and select Edit from the pop-up menu.
3. Select the Values tab.
4. From the Dimension drop-down list, select “1 dependency”. Make sure that “Materials” is selected in the drop-down list that appears.
5. As you see, the table now has a row for each material. The top row can be used for default values. If no value is specified for a material, the default value is used.
6. Assign the following values to the k_uptake parameter:

Assigning values to k_excretion

Follow the same procedure as above, and assign the following values to k_excretion:

Assigning initial conditions

Ecolego will automatically convert all compartments to vectors when materials are added to the model.

1. In the Interaction matrix of the Matrix window, edit the first compartment.
2. Select the Values tab. As the compartment is a vector, you must now assign initial inventories of all material:

Next

• Running a simulation (6/7)

Previous

• Vectorising the model (4/7)

References

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