Page 15 - Continuous Process Modeling Quick Start Guide
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On graphs and in data tables
ExtendSim comes with a number of flexible graph types to use in models; the Reservoir model uses a Line Chart block.
The Reservoir model runs for a simulated 36 months. While the model runs, ExtendSim displays the history of the values over time on the Line Chart’s Graph tab, which by default remains open when the simulation is finished.
The Line Chart in this model has infor- mation entering three of its input connec- tors, so the graph displays three lines. The graph also has two value axes, each using a different scale. The graph’s leg- end indicates which axis is used for each line (Y2 indicates the values are plotted against the right axis) and what each line represents.
In this case, the blue line, labeled 1, is matched with the left axis to show the total contents of the reservoir over time. Using the right axis, the red line (2) shows the amount of water enter- ing the reservoir from the rainfall alone and the green line (3) shows the input from the stream. (Because the model uses random numbers for the stream, specific values may be different after each run.)
☞ To access windows for customizing how the graph is displayed and how the lines are drawn on it, right click on the Graph tab. To tear off one of the Line Chart’s tabs so it is in a separate win- dow, click and drag the tab by its name. Click a torn-off tab’s close box to return it to the Line Chart.
Model Basics 11
Opening and exploring a model
The Line Chart’s Data tab shows the data points which produce the line, as seen on the left.
The Line Chart’s Dialog tab has options for when to show the graph, when to autoscale, and so forth.
In Notebooks
Notebooks are customizable tear-off windows that are often used as a “dashboard” for the model - to control model parameters, report simulation results, and document the model. The

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