GMS:Error Summary Plot: Difference between revisions
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{{MODFLOW Links}} | {{MODFLOW Links}} | ||
An Error Summary plot is one of the plot types that can be created by the [[GMS:Plot Wizard|Plot Wizard]]. See the [[GMS:Plot_Wizard#Error_Summary|Error Summary]] plot section on the Plot Wizard page for a basic description. The Error Summary plot is used to display a text listing of the mean error, mean absolute error, and root mean squared error for an observation measurement in a coverage. The error values may be listed for a single time step of a dataset or for all time steps. | An ''Error Summary'' plot is one of the plot types that can be created by the [[GMS:Plot Wizard|''Plot Wizard'']]. See the [[GMS:Plot_Wizard#Error_Summary|Error Summary]] plot section on the Plot Wizard page for a basic description. The ''Error Summary'' plot is used to display a text listing of the mean error, mean absolute error, and root mean squared error for an observation measurement in a coverage. The error values may be listed for a single time step of a dataset or for all time steps. | ||
==Error types== | ==Error types== | ||
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== MODFLOW errors == | == MODFLOW errors == | ||
The Error Summary Plot is most useful with models that do not make error computations from observation data. MODFLOW does compute error computations from observation data, and these errors are available in the [[GMS:MODFLOW Solution Properties Dialog|MODFLOW properties dialog]]. Therefore, when using MODFLOW, you should use the MODFLOW properties dialog and not the Error Summary Plot. The errors shown in the Error Summary Plot are not the same as those found in the MODFLOW properties dialog due to the time matching and interpolation issues described above. The MODFLOW properties dialog shows the errors computed by MODFLOW for the observations at the actual observation times and is therefore superior. The errors reported by MODFLOW have nothing to do with the model output times, only observation times. | The ''Error Summary Plot'' is most useful with models that do not make error computations from observation data. MODFLOW does compute error computations from observation data, and these errors are available in the [[GMS:MODFLOW Solution Properties Dialog|MODFLOW properties dialog]]. Therefore, when using MODFLOW, you should use the MODFLOW properties dialog and not the ''Error Summary Plot''. The errors shown in the Error Summary Plot are not the same as those found in the MODFLOW properties dialog due to the time matching and interpolation issues described above. The MODFLOW properties dialog shows the errors computed by MODFLOW for the observations at the actual observation times and is therefore superior. The errors reported by MODFLOW have nothing to do with the model output times, only observation times. | ||
== Plot creation == | == Plot creation == | ||
Error Summary plots are created in the Plot Wizard by setting the plot type to Error Summary. A sample plot is shown in the figure. | Error Summary plots are created in the ''Plot Wizard'' by setting the plot type to Error Summary. A sample plot is shown in the figure. | ||
{{hide in print|[[Image:ErrorSummary.gif]]}} | {{hide in print|[[Image:ErrorSummary.gif]]}} | ||
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: '''''Coverage''''': Displays the name of the coverage where the current data for the plot is coming from. | : '''''Coverage''''': Displays the name of the coverage where the current data for the plot is coming from. | ||
: '''''Measurement''''': This is the name of the current measurement, created in the Feature Objects | Attributes dialog, being plotted. | : '''''Measurement''''': This is the name of the current measurement, created in the ''Feature Objects'' | '''Attributes''' dialog, being plotted. | ||
: '''''Feature Objects''''': Displays which feature object is utilized in the current plot, points or arcs. | : '''''Feature Objects''''': Displays which feature object is utilized in the current plot, points or arcs. | ||
