topcat & stilts
DESCRIPTION
Primer Curso Práctico de la red Temática SVO Granada, 27-28 de octubre de 2009. TOPCAT & STILTS. Francisco Jiménez Esteban Spanish Virtual Observatory LAEX-CAB (INTA-CSIC). TOPCAT. Interactive graphical viewer and editor for tabular data. - PowerPoint PPT PresentationTRANSCRIPT
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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 (INTA-CSIC)
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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 – [email protected] Granada 27-28 de octubre de 2009
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TOPCAT: Control Window
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
- The right hand panel describes the characteristics of the current table.
- The buttons along the top allow launching of various other windows.
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TOPCAT: Load Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
Load Data:
- You can load your local tables.
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TOPCAT: Load Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
Cone Search:
- Service available on the web.
- The list is obtained from a VO registry.
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TOPCAT: Table Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
Data:
- Scroll around.
- Sort rows.
- Define subsets.
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TOPCAT: Table Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
Columns:
- Information about each column.
- Columns can be hidden/revealed, and new ones added.
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TOPCAT: Table Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
Subsets:
- See all the row subsets defined, and to define more.
- Can be defined using algebraic expression, or graphically.
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TOPCAT: Table Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
Statistics:
- Calculate statistics for all or a selection of rows.
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TOPCAT: Plot Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
- 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
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TOPCAT: Plot Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
2D:
- Plot pairs of columns.
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TOPCAT: Plot Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
3D:
- Plots on Cartesian axes.
- Rotate the axes by dragging the mouse.
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TOPCAT: Plot Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 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.
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TOPCAT: Plot Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 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.
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TOPCAT: Plot Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 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.
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TOPCAT: Match Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
Concatenate:
- Concatenate the rows of existing tables to create new ones.
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TOPCAT: Match Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
1 Table:
- Mark groups of rows.
- Eliminate All grouped.
- Eliminate All but First.
- New tables with groups.
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TOPCAT: Match Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
2 Tables:
- Specify a match operation which will join two tables.
- A wide range of multivariate matches is possible.
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TOPCAT: Functions Windows
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
Available Functions:
- Displays the details of the functions which can be used to define new columns and subsets.
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STILTS
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 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
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STILTS
Francisco Jiménez Esteban – SVO – [email protected] Granada 27-28 de octubre de 2009
- 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 <stilts-flags> <task-name> <task-args>