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TOPCAT & STILTS Primer Curso Práctico de la red Temática SVO Granada, 27-28 de octubre de 2009 Francisco Jiménez Esteban Spanish Virtual Observatory LAEX-CAB.

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Presentation on theme: "TOPCAT & STILTS Primer Curso Práctico de la red Temática SVO Granada, 27-28 de octubre de 2009 Francisco Jiménez Esteban Spanish Virtual Observatory LAEX-CAB."— Presentation transcript:

1 TOPCAT & STILTS Primer Curso Práctico de la red Temática SVO Granada, de octubre de 2009 Francisco Jiménez Esteban Spanish Virtual Observatory LAEX-CAB (INTA-CSIC)

2 TOPCAT Interactive graphical viewer and editor for tabular data. It can examine, analyse, combine, edit and write out tables. It understands a number of different astronomically important formats. A million rows by a hundred columns. Francisco Jiménez Esteban – SVO – de octubre de 2009

3 TOPCAT: Control Window Francisco Jiménez Esteban – SVO – de octubre de The right hand panel describes the characteristics of the current table. - The buttons along the top allow launching of various other windows.

4 TOPCAT: Load Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Load Data: - You can load your local tables.

5 TOPCAT: Load Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Cone Search: - Service available on the web. - The list is obtained from a VO registry.

6 TOPCAT: Table Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Data: - Scroll around. - Sort rows. - Define subsets.

7 TOPCAT: Table Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Columns: - Information about each column. - Columns can be hidden/revealed, and new ones added.

8 TOPCAT: Table Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Subsets: - See all the row subsets defined, and to define more. - Can be defined using algebraic expression, or graphically.

9 TOPCAT: Table Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Statistics: - Calculate statistics for all or a selection of rows.

10 TOPCAT: Plot Windows Francisco Jiménez Esteban – SVO – de octubre de Set axis labels and ranges - Different colors or symbols for different sets of data. - Error bars - Configurable plot markers - Zoom in or out. - Select a Subset. 1D histograms: - Set bin width and offset

11 TOPCAT: Plot Windows Francisco Jiménez Esteban – SVO – de octubre de D: - Plot pairs of columns.

12 TOPCAT: Plot Windows Francisco Jiménez Esteban – SVO – de octubre de D: - Plots on Cartesian axes. - Rotate the axes by dragging the mouse.

13 TOPCAT: Plot Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Spherical Polar: - Plots 3D plots on spherical polar axes. - Plot points only on the surface of the sphere or on the interior. - Rotate the axes by dragging the mouse.

14 TOPCAT: Plot Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Stacked Line: - Plots one or more X-Y line plots using the same X axis but different Y axes. - This can be particularly useful for visualizing time- series data.

15 TOPCAT: Plot Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Density Maps: - The intensity of color at each pixel reflects the number of points that fall within its bounds. - Pixel size can be changed, cut levels can be altered. - This is very useful for analysis and visualization of extremely crowded plots.

16 TOPCAT: Match Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Concatenate: - Concatenate the rows of existing tables to create new ones.

17 TOPCAT: Match Windows Francisco Jiménez Esteban – SVO – de octubre de Table: - Mark groups of rows. - Eliminate All grouped. - Eliminate All but First. - New tables with groups.

18 TOPCAT: Match Windows Francisco Jiménez Esteban – SVO – de octubre de Tables: - Specify a match operation which will join two tables. - A wide range of multivariate matches is possible.

19 TOPCAT: Functions Windows Francisco Jiménez Esteban – SVO – de octubre de 2009 Available Functions: - Displays the details of the functions which can be used to define new columns and subsets.

20 STILTS Francisco Jiménez Esteban – SVO – de octubre de 2009 STILTS is a set of command-line tools for processing tabular data. Its facilities: - Cross-matching - Format conversion and validation - Column calculation and rearrangement - Row selection - Sorting - Plotting - Statistical calculations - Metadata display

21 STILTS Francisco Jiménez Esteban – SVO – de octubre de Accept streamed data so the size of tables which can be processed is not limited by available memory. - In general, the form of a command is java –jar /path/stilts.jar


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