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Add data source
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Button
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Click this button to display the
Select Data Sources dialog box, where you can specify a data source to add to the list
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Remove data source
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Select a data source in the grid at the top of the tab and click this button to remove that data source from the grid
Note: To change the sequence in which the data sources are aligned/merged, select a data source and click the arrow buttons at the side of the grid. Click the down arrow to demote the selected source; click the up arrow to promote the selected source
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Options/properties applicable to selected data source above
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These options apply to the data source selected in the grid
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Variables
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Button
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Click this button to display the
Select Variables dialog box, where you select date/time and output variables
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Variable specs
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Button
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Click this button to display the
Variable Specification dialog box, which provides data cleaning and aggregation options for each selected output variable. Adjacent to the
Variable specs button, the word default is displayed if no specifications have been changed
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Add/subtract constant time: Shift time by
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Check box
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Select this check box to shift date/time stamp by a specified amount of time: positive number to add time or negative number to subtract time. Values can be shifted by one of three time interval types: Minutes , Hours , or Days
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Assume data is sorted ascending by date (merge step will be faster)
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Check box
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Select this check box to decrease runtime significantly for very large data sets that are pre-sorted ascending by date. If the data are not sorted ascending by date, a warning message displays
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Use input data case selection conditions
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Check box
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Select this check box to specify that Statistica uses a subset of cases as defined in the input spreadsheet conditions
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Use variable prefix
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Check box
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When this check box is selected, variables in the output contain a default prefix, which is the data source name. The prefix can be changed in the adjacent edit box
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Only use when sources have duplicate variable names
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Check box
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When this check box is selected, only duplicate variables contain a prefix
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Aggregation interval for all data source(s)
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The selected date/time interval aligns data across all defined data sources
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Minutes
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Option button
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When this option button is selected, the aggregation interval is minutes, starting from the minute specified. Limit of k minutes (1
 k < 60)
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Hours
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Option button
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This is the default aggregation interval. When selected, the aggregation interval is hours, starting from the hour specified. Limit of l hours (1
l < 24)
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Days
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Option button
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When this option button is selected, the aggregation interval is days, starting from the day specified. Limit of m days (1 m
9999)
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Weekly - start from
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Option button
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When this option button is selected, the aggregation interval is weeks, starting from the day of the week specified (i.e. Monday , Tuesday , Wednesday etc.)
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Monthly - start from
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Option button
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When this option button is selected, the aggregation interval is months, starting from the day of the month specified. Limit of 1 through 31
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Quarterly - start from
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Option button
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When this option button is selected, the aggregation interval is quarters, starting from the date specified. Limit of January 1 through December 31
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Annually - start from
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Option button
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When this option button is selected, the aggregation interval is years, starting from the date specified. Limit of January 1 through December 31
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