cis6930fa11_Wranger

cis6930fa11_Wranger - Wrangler Interactive Visual...

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Unformatted text preview: Wrangler: Interactive Visual Specification of Data Transformation Scripts Presented by Kun Li [email protected] Outline: 1. USAGE SCENARIO 2. DESIGN PROCESS 3. WRANGLER TRANSFORMATION LANGUAGE 4. THE WRANGLER INTERFACE DESIGN 5. THE WRANGLER INFERENCE ENGINE 6. COMPARATIVE EVALUATION WITH EXCEL 1. CONCLUSION AND FUTURE WORK USAGE SCENARIO Wrangler Interface USAGE SCENARIO Row deletion USAGE SCENARIO Text Extraction USAGE SCENARIO Filling missing values USAGE SCENARIO Table reshaping Transformation Script WRANGLER TRANSFORMATION LANGUAGE Map transforms map one input data row to zero, one, or multiple output rows. Lookups and joins incorporate data from external tables. Wrangler includes extensible lookup tables to support common types of transformations, such as mapping zip codes to state names for aggregation across states. Reshape transforms manipulate table structure and schema.Wrangler provides two reshaping operators: fold and unfold. Positional transforms include fll and lag operations. Fill operations generate values based on neighboring values in a row or column and so depend on the sort order of the table. The lag operator shifts the values of a column up or down by a specifed number of rows Basic Interactions The Wrangler interface supports six basic interactions within the data table. select rows select columns click bars in the data quality meter select text within a cell, edit data values within the table assign column names, data types or semantic roles....
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This note was uploaded on 11/09/2011 for the course CIS 6930 taught by Professor Staff during the Fall '08 term at University of Florida.

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cis6930fa11_Wranger - Wrangler Interactive Visual...

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