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A '''scratch variable''' is a temporary variable that is not initialized between cases. As a program iterates over each row of data, scratch variables retain their value. |
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| Scratch variables are declared like: | Scratch variables are declared with a hash (`#`) prefix. Try: |
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Note the names are prefixed with a hash (`#`). This is a requirement. |
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| Scratch variables are firstly useful as temporary variables. They are deleted in the next execution (e.g. the next `EXECUTE` command). | Scratch variables are firstly useful as temporary variables. They are automatically deleted in the next [[SPSS/Execute|execution]]. |
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| Scratch variables are also useful for data aggregation, as they are not re-initialized for each case. | Scratch variables can also be used to aggregate data. |
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SPSS Scratch Variables
A scratch variable is a temporary variable that is not initialized between cases. As a program iterates over each row of data, scratch variables retain their value.
Contents
Declaration
Scratch variables are declared with a hash (#) prefix. Try:
compute #TotalSales = sum(Sales, #TotalSales).
Usage
Scratch variables are firstly useful as temporary variables. They are automatically deleted in the next execution.
Scratch variables can also be used to aggregate data.
compute #TotalSales = sum(Sales, #TotalSales). compute Total_Sales = #TotalSales.