View interactive and configurable plots of column-based quantities against each other distinguishing different data sets:.Sort rows on the values in a given column.Insert ‘synthetic’ columns defined by algebraic expression.View/edit table data in a scrollable browser.Fast access to large datasets (millions of rows/hundreds of columns).However, because it uses Virtual Observatory (VO) standards, it can cooperate smoothly with other tools, services and datasets in the VO world and beyond. TOPCAT 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. Synthetic columns can be created and row selections made using a powerful and extensible algebraic expression language. It has facilities for plotting, cross matching, row selection, sorting and manipulation of data and metadata.
It understands a number of different astronomically important formats (including FITS, VOTable and CDF) 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. Tool for OPerations on Catalogues And Tables (TOPCAT) is an interactive graphical tool for analysis and manipulation of tabular data.
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