Results for an Ensemble Analysis are generated by computing it. Changes in all the components used in the analysis are automatically tracked to determine if the results are current. When the results are no longer current, the analysis must be recomputed in order to refresh the results. Computing results begins with selecting an Ensemble Analysis .

Selecting a Current Ensemble Analysis 

There are two ways to select the current Ensemble Analysis. Both methods set the analysis so that it can be computed and results can be accessed from the Watershed Explorer.

The first way to select the current Ensemble Analysis is from the Toolbar. The compute selection box shows all of the compute components in the project; Ensemble Analyses will be the last compute type to appear in the selection box. Each Ensemble Analysis in the selection box includes the prefix Ensemble followed by the name of the analysis. Click on the toolbar selection box and choose an Ensemble Analysis to become the current analysis.

The second way to select the current Ensemble Analysis is from the Watershed Explorer, on the Compute tab. Select the Ensemble Analysis you wish to become the current analysis by clicking on it in the Watershed Explorer. The Ensemble Analyses are listed alphabetically in the Ensemble Analysis folder.

Computing an Ensemble Analysis 

There are three ways to compute the currently selected Ensemble Analysis. All methods automatically perform parameter checking, and if no errors are generated, proceed to the actual computing of Ensemble Analysis results. Additionally, the program is designed to be computationally efficient. Only components with data changes since the last compute will be recomputed; the remainder of the components have not changed so previous analysis results are still applicable. If you wish, you may force all components to be recomputed regardless of data changes since the last compute.

The first way to compute an Ensemble Analysis is from the Compute menu. Click on the Compute menu and then select the Compute Ensemble command. The name of the current Ensemble Analysis will be shown in brackets as part of the menu command. If the command is not available, it is because there is no current Ensemble Analysis; you must first select an analysis. A window will automatically open that shows the progress of the compute. You will need to manually close the window when the compute is done, whether it failed or was successful. If you wish to force all components to be recomputed instead of just those with data changes, hold the CTRL key while selecting the menu command.

The second way to compute an Ensemble Analysis is from the Watershed Explorer, on the Compute tab. Select the Ensemble Analysis you wish to compute by clicking on it in the Watershed Explorer with the right mouse button. A context menu is displayed that contains several choices including compute. Click the Compute command. The progress window will automatically open. If you wish to force all components to be recomputed instead of just those with data changes, hold the CTRL key while selecting the right mouse menu command.

The third way to compute an Ensemble Analysis is from the Toolbar. The compute button is enabled whenever there is a current analysis that can be computed. If the button is not available or shows a different type of compute, you must first select a Ensemble Analysis . Press the button to compute the current Ensemble Analysis . The progress window will automatically open. If you wish to force all components to be recomputed instead of just those with data changes, hold the CTRL key while selecting the toolbar button.

Computing Multiple Analyses

Multiple Ensemble Analyses can be computed in rapid succession. Each analysis included for simulation is internally managed the same as if it were computed in isolation. The steps automatically performed for the user begin with selecting the Ensemble Analysis, checking parameters for the analysis, and finally computing the simulation. This sequence is repeated in rapid succession for each Ensemble Analysis in the selected set. Appropriate feedback is provided through a progress bar.

The multiple Ensemble Analyses must exist before they can be selected for a multiple compute. Select the Multiple Compute command on the Compute menu. A manager is used to select Ensemble Analysis (see figure below). Make selections in the list and then press the Compute button to begin computing the selected analyses. A separate progress bar will be displayed for each Ensemble Analysis as it is computed. The progress bar may disappear automatically at the conclusion of an Ensemble Analysis depending on the configurations in the Program Settings. If errors are encountered while computing an analysis, the progress bar will always remain visible after all selected analyses have finished computing regardless of any other settings.

Ensemble Analysis Multiple Compute