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TSTooI Documentation manipulated. The following example illustrates how the time series identified by 08235350 . USGS . Streamf low .Month has its data values modified by adding the data from the time series identified by 0 8 2 3 6 0 0 0. USGS . S t re amf 1 ow .Month. # Example commands 08235350.USGS.Streamflow.Month-HydroBase 08236000.USGS.Streamflow.Month-HydroBase add (08235350.USGS.Streamflow.Month,IgnoreMissing,08236000.DWR.Streamflow.Month) 08235350.USGS.Streamflow.Month-HydroBase To locate a time series so that it can be modified, TSTooI first checks the alias of known time series (those that have been defined in previous commands) against the current time series of interest (08235350 . USGS .Streamflow. Month, the first argument of the add O command) ,assuming that this string is an alias. If the alias is not found, it checks the full identifier of known time series against the current time series of interest. In this example, time series 08235350 . USGS .Streamflow .Month was read in the first step and is therefore found as a match for the identifier. Similarly, the second time series in the command (08236000 . USGS .Streamflow .Month) is found and is used to process the command, resulting in a modification of the first time series. Sequential manipulations of the same time series can occur (e.g., fill by one method, then fill by another). To locate time series in memory, TSTooI looks through the list of time series, searching backwards. In this way, it is possible to use the same identifier more than once in a command file while allowing localized processing of each time series. In the above example, the time series identified by 08235350 . USGS .Streamflow . Month~HydroBase is read twice, once to be acted on by the add () command, and once with no manipulation (e.g., to compare the "before" and "after"). During processing, extra time series can accumulate and will be present during output steps. There are two ways to indicate that a time series should only be used temporarily: Use the free O command to free time series that are no longer needed. This removes the time series from memory. See also the deselectTimeSeries O and selectTimeSeries ( ) commands. Use the TEMPTS notation in commands that support it. For example, the f illRegression ( ) command requires a dependent (to be filled) and independent (data for filling) time series. Because it may not be desired to output the independent time series, it can be treated as a temporary time series. The edit dialog for the f i 11Regression O command allows you to right click on the independent time series and convert it to a TEMPTS. This keyword tells TSTooI to read the time series for the command and then free the time series as soon as it has been used. Not all commands accept the TEMPTS notation -use the command editors to create supported commands. Note that when editing commands, you typically select identifiers for time series that have been defined to that point in the commands list. If TEMPTS is used, you will need to add the time series before the command and then remove the time series after the TSTooI command editor has found the time series for use with the TEMPTS notation. Alternatively, edit the command manually to bypass the editor's help. Introduction - 7