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Modifiers can be entered and managed through the Time Series Modifier Display.
Time Series Modifier Display
Modifiers are defined through the modifier display, which can be opened either through the FEWS explorer menu, or through the toolbar on the main window (when configured).
The modifier display contains five sections;
• A tree view of the pre-configured display groups containing links to time series to which modifiers can be applied.
• A panel allowing the user to select the specific location to which a modifier is to be applied.
• A panel allowing the user to select the specific parameter to which a modifier is to be applied.
• A main window showing time series contained in the display group selected.
• An information panel allowing new modifiers to be defined, and existing modifiers to be managed.
Selecting a time series to which a modifier is to be applied
To select the time series to which the modifier is to be applied, identify and select the display group in which the time series is contained in the tree view on the left.
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Following selection of the parameters the selection will be visible in the Create New tab of the Modifier information panel.
Creating a new modifier
To create a new modifier, select the time series (location & parameter) to which the modifier is to be defined.
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Select Create on completion of the modifier.
Modifier Operations
The types of modifier that are available are:
• Add - allows a value to be added to the original data for a defined time span.
• Subtract- allows a value to be subtracted from the original data for a defined time span
• Multiply - allows a value to be given with which original data is multiplied for a defined time span.
• Divide - allows a value to be given with which original data is divided for a defined time span.
• Replace - allows a value to be given that replaces the original data for a defined time span.
• Missing - allows the original values with missing data for a defined time span.
• Time Shift - allows a time increment to be defined with which the original data is to be shifted (not yet available).
• Edit - allows a time series of values to be defined either as a table of values or through interactive editing on the graph, which replace the time series for a defined time span.
Modifier change start and end time
A modifier is applied to the original data for a defined time span. This is defined as a start time and an end time. These times relate to the data in the time series, and not to the time on the computer.
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