Cases, Variables, Formats

• What are cases and variables?
  Statistica data files are organized into cases and variables. If you are not familiar with this notation, you can think of cases as the equivalent of records in a database management program (or rows of a spreadsheet) and variables as the equivalent of fields (columns of a spreadsheet). Each case consists of a set of values of variables.
• Why do we need different variable types?
  
• How do I add or delete variables (columns of data)?
  
• How do I add/delete cases (rows of data)?
  
• Can I select (highlight) the entire spreadsheet?
  
• Can I edit the contents of a cell (and not overwrite it)?
  Yes. Follow the standard spreadsheet (example, Microsoft Excel) conventions; specifically:
• How are dates represented in Statistica data files?
  Date values of variables are stored internally as a single integer value that represents the number of days that have passed since January 1, 1900.
• How is time represented in Statistica data files?
  Time values of variables are stored as (optional) decimal values representing the fraction of the day since midnight; for example, 6:00 A.M. is stored as 0.25. Time values stored in this manner can be used in subsequent analyses and transformed using arithmetic operations; at the same time, they can be displayed as times in reports or graphs (example, used to label scale values).
• How do I convert date-values into text values and vice-versa?
  
• How do I review and edit variable specifications (names, formats, notes, formulas)?
  
• How are missing data handled in Statistica?
  
• How do I change the missing data code for individual variables?
  
• How do I edit case names?
  
• How do I create a new cell/block format?
  A format is a group of formatting options that you can save with an assigned name for future use. Formats can be assigned to numbers as well as text. To create a new format in a spreadsheet, follow these instructions:
• How do I apply a format?
  
• How do I create a new spreadsheet layout?
  
• How do I apply a spreadsheet layout?
  You can apply any existing spreadsheet layout to the active spreadsheet. To do this:
• What is the difference between hidden and excluded case states?
  In Statistica, case states enable you to add supplementary case information that can be employed in further analyses. The primary function, and in most instances the only function, of case states is to determine the appearance of the case in a graph.

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