![]() It is a stand-alone application which works quite happily with no network connection. Table data and metadata can be edited and the resulting modified table can be written out in a wide range of output formats. Using a powerful and extensible Java-based expression language new columns can be defined and row subsets selected for separate analysis. It offers a variety of ways to view and analyse tables, including a browser for the cell data themselves, viewers for information about table and column metadata, and facilities for 1-, 2-, 3- and higher-dimensional visualisation, calculating statistics and joining tables using flexible matching algorithms. It understands a number of different astronomically important formats (including FITS and VOTable) and more formats can be added. Its aim is to provide most of the facilities that astronomers need for analysis and manipulation of source catalogues and other tables, though it can be used for non-astronomical data as well. TOPCAT: Tool for OPerations on Catalogues And TablesĪbstract: TOPCAT is an interactive graphical viewer and editor for tabular data. ![]()
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