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 Table of Contents
Correlation Display
The Correlation display allows application of the Correlation Utility in an interactive manner. Correlations can be evaluated and derived between datasets using various criteria. The derived correlation can for example be applied to monitored time series data or manually entered data points.
Input
At first, a correlation group should be selected from which a dataset will be used for making a correlation. Next, a forecast location needs to be selected and a support location or a number of support locations. With these steps a dataset is selected from a configuration file with pre-defined correlation input values for making a correlation.
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After having selected a dataset for which a function should be fitted, a regression equation can be selected. The available equations are shown below. For the polynomial regression, an order can be entered.
Scatter Plot
When selecting the Scatter Plot tab, a scatter plot is displayed. Defining the criteria for the restriction of the dataset- if any- and the best regression equation, requires probably a number of iterations where the scatter plot will prove to be helpful.
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In addition, the travel time computed from the selected events is presented in the field Travel time .
 Wiki MarkupA   forecaster   can   also   enter   a   value   in   the   cursor   column   for   the   support   location.   By   pressing  \ [ENTER\]   the   correlation   display   computes   the   forecast   with   the   equation   and   shows   the   result   in   the   equation   column.
Forecast
On the Forecast tab of the Correlation display, the derived regression equation can be applied to a monitored data series for the support location or a manually entered value.
 Wiki MarkupBy   entering   the  _Time   zero_  (T0),   the   FDO   can   review   the   result   of   the   application   of   the   derived   regression   equation   in   time.   After   T0   is   changed,   pressing  \ [Refresh\]   will   update   the   graph.
In the displayed graph, the observed water levels at the support and forecasting locations are respectively given in blue and red. The thin line is the time series that results from applying the regression equation to the observed time series at the support location.
Events
The events tab shows a list of all events used in the correlation function. The list includes the dates, forecast level, support level and , travel time of the selected events, comments and tags (user configured in CorrelationEventSets file). These can be sorted by clicking on the header of each column.
Show Report and Close
 Wiki MarkupThe   forecasts   generated   by   applying   the   regression   relation   can   be   presented   in   a   report   with  \ [Show   Report\]   when   required.   With  \ [Close\],   a   user   can   leave   the   Correlation   display. 
The generated report includes the selected events and the computed correlation function. This report can be printed or saved to a text file.
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