Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Status of AIDA and JAS 3 by Victor Serbo What is AIDA History/Collaboration/Documentation Some Details Examples Future plans JAS: Description and Status Conclusion

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, What is AIDA Abstract Interfaces for Data Analysis (AIDA) “The goals of the AIDA project are to define abstract interfaces for common physics analysis objects, such as histograms, ntuples, fitters, IO etc.The adoption of these interfaces should make it easier for developers and users to select to use different tools without having to learn new interfaces or change their code. In addition it should be possible to exchange data (objects) between AIDA compliant applications.”

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Abstract Interfaces Only define “protocol” that analysis objects have to understand, no internal details Can use object only through Abstract Interface Define only pure virtual methods –AIDA defines behavior, analysis tool provides implementation Use Factories to be able to switch implementations easily: –IAnalysisFactory af = IAnalysisFactory.create();

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Motivation Advantages –The user needs to learn only one set of interfaces –Same user code can be used with different AIDA- compliant analysis applications –Different analysis tools can exchange analysis objects same storage format, use functionality from other tools –Pool experience of different developer teams LHC++, OpenScientist, JAS Two versions of AIDA interfaces –One for C++ –One for Java –As identical as possible

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, AIDA Example Use same code with any AIDA-compliant analysis tool. AIDAAIDA User code (e.g. GEANT4) Analysis tool 1 Analysis tool 2

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, History Initial idea formed during discussion at HepVis-99 workshop at Orsay –Informal AIDA discussions at CERN in 2000 –AIDA workshops: January Paris/Orsay April Boston (preceding HepVis 2001) Informal meetings (e.g during Geant4 meetings and video conferences) June 2002 – CERN –Interfaces have been designed by discussion and (eventual) consensus Takes some time, but result is well though out and robust

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Organization - Developers No formal collaboration/author list. Some people who have contributed (ideas, code, etc). –Guy Barrand, Pavel Binko, Grzegorz Chwajol, Mark Donszelmann, Wolfgang Hoschek, Tony Johnson, Emmanuel Medernach, Dino Ferrero Merlino, Lorenzo Moneta, Jakub Moscicki, Ioannis Papadopoulos, Andreas Pfeiffer, Max Sang, Victor Serbo, Max Turri Apologies to people accidentally missed

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Organization – Code, Documentation AIDA – open source project –CVS repository: cvs.freehep.org “anonymous” download available –Web page: General information, relevant links Tutorial, users’ guide, examples Downloads and web-browsable source code Test cases (coming soon)

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Current Status AIDA Version 2.2 released (December 2001) –First “End User” release –Three implementations of AIDA exist Anaphe/Lizard (C++) – Open Scientist (C++) – JAIDA/JAS (Java) + AIDA-JNI 1.0 (C++) – –GEANT4 adopted AIDA for analysis AIDA 3.0 Currently under discussion –Release: end of September 2002

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, AIDA Interfaces Summary AIDA Factories ITuple IHistogram ICloud ITree

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Example Program (Java) Create, fill, and view 1D and 2D histograms Factories: –Can switch implementations without recompiling –Framework can hide factories l ;

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, ITuple ITuple - interface to the DataITuple –“get/set” methods for double, float, int, … –Information about columns: min, max, mean, rms –Navigating: start(), next(), skip(int nRows) –Project ITuple into 1D, 2D, 3D histogram –New features for AIDA 3.0: Support for complex internal structures (subfolders) Chaining of ITuples

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, IHistogram (1D-3D) Binned histogram: IHistogram1D, 2D, 3DIHistogram1D –“fill” methods (with/without weight) –Histogram info: entries, mean, rms, axis –Bin info: centre, entries, height, error –Histogram arithmetic: add, multiply, divide –Convenience methods, like coordinate-to-index conversion

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, ICloud Unbinned collection of points: ICloud1D, 2D, 3DICloud1D –Can represent scatter plot, dynamically rebinnable histogram –Can be converted to a binned histogram –Standard “get/set” methods for entries –Collection info: lower, upper, mean, rms

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, IFunction and Fitting Fitting: IFunction, IFitFunction –IFunction – simple interface, allows to set parameters and get function value –IFitFunction – fit function to a histogram Extends IFunction Various fit control methods: step size, bounds, etc. Allows to perform fit and get results AIDA 2.2 fitting functionality fairly limited –AIDA 3.0 (Under discussion) extended functionality

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, ITree –directory-like structure (Unix directory convention) Methods like: cd, ls, mkdir, etc. –AIDA analysis objects (tuples, histograms, clouds, ets.) exist within ITree directories –“save/restore” functionality, hides storage details from the user Compatible with database or file storage Can support multiple file formats Mount/Unmount functionality (like unix) allows multiple stores to be seamlessly merged AIDA XML format is defined for data interchange

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Future (unofficial ideas) Developer-level interfaces –Code sharing –More robust operation Put AIDA-based utilities in CVS –Utility to test AIDA implementations –User contributions Common binary storage format More development in fitting interfaces –IFitter, IOptimizer, IFitResult, IPlotter

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, JAS Java Analysis Studio (JAS) –Written entirely in Java – really portable –Originally targeted at offline analysis – but also used extensively for online monitoring –Rich, easy to use GUI Can view trees, plots, HTML pages with embedded active objects –Built-in editor/compiler for writing analysis code Based on open source JEdit editor (pure Java editor, syntax highlighting, auto indent, parenthesis matching, etc.) –Local and Client-Server Operation Access local or remote analysis objects Can send analysis code to the data and ship back only the results

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, JAS (continue) Java Analysis Studio –Modular/Extensible via Plugins Plugins extend basic JAS functionality –Define experiment-specific utilities (event display, analysis utilities, specialized tables) –Add menus, create control areas, consoles, and output pages Data Format Independent through Data Interface Modules (DIM) –DIM is special type of Plugin – makes data available for JAS –DIMs exist for PAW, Root, Flat Files, SQL, stdHEP, HepTuples –You can write your own DIM for your data format Plugin examples: –Particle decay tree –WIRED event display

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, JAS GUI Built-in HTML viewer with embeddable “objects” (plots, buttons, etc.). Pages can display histograms. User can control layout, add, remove plots. Tree area provides access to analysis objects. Each item has popup menu and double- click action. Plot Widget, shows data in real time, optimized for fast refresh performance.

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, JAS Usage BaBar Online Monitoring –Online Monitoring API –Static HTML pages with embedded live and reference plots. Plots can be overlaid. US Linear Collider Studies –Have an entire recon+analysis package written in Java Using JAS as analysis interface Making use of remote data access using repository at University of Pennsylvania Other smaller scale users

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, JAS 3 Major rewrite of many JAS components –Use AIDA interfaces and JAIDA implementation for analysis: histograming, histogram arithmetic, fitting, tuples etc. –The JAS plot widget will become the FreeHEP plotterFreeHEP plotter –JAS itself will become a modular application framework, into which various analysis components can be plugged. Major plugins will include WIRED, the JAS Plotter, and JAIDA. WIREDJAIDA –Scripting support (Jython ?) –New module Example: JAS Tuple Explorer, is being used by the Babar Ambient Data explorer

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Tuple Explorer Display Tree Leaves –Plot –Histogram –XY Plot –Create new columns –Apply cuts BaBar uses Tuple Explorer as Ambient DB browser Demo after talk

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Conclusion AIDA is becoming mature project –Functionally sound –Regular meetings –Release schedule Next release of AIDA and AIDA-compliant analysis tools – September 2002 JAS 3 –Easy to use and extend –Uses Java implementation of AIDA for analysis

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Details (backup): Histogram Cloud Tuple Tree FreeHEP Plotter

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Details - ITuple Interface to the Data:

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Details – IHistogram (1D-3D) IHistogram: Common functionality for all histograms (like entries, label, dimension,) IHistogram1D IHistogram2D IHistogram3D

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Details - ICloud Unbinned collection of points: ICloud1D, 2D, 3D –Can represent scatter plot, dynamically rebinnable histogram –Can be automatically converted to a binned histogram ICloud: Common functionality for all histograms (like entries, label, dimension,) ICloud1D ICloud2D ICloud3D

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Details – ITree Directory-like structures: ITree

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Details - FreeHEP PlotterFreeHEP Plotter FreeHEP Plotter The FreeHEP plotter will be based on the existing JAS Plotter (JASHist), but with changes to add new features requested by users, a plugin structure to make adding new plot types easier, and a more flexible data model to make attaching various different data types possible. The FreeHEP plotter will fully support displaying all AIDA plots types.JASHistAIDA A partial list of design goals include: –Support for histogram, XYPlot, ScatterPlot, 2D color maps, lego plots, contour plots.. –Must be able to use any object as annotation or labels (arrows, latex, etc.) –Must be able to build complex plots (multiple axes, shared axes, etc.) –Extensible set of renderer –Extensible set of data source interfaces –Arbitrary map from axis to coordinate system (log, linear) –Support 2D and 3D drawing (and in principle also inventor, opengl etc.) –Able to support strings (sorted?), dates, numeric axis –Binned and non-binned axes, rebinning for binned axis –Output as postscript, SVG etc. –Variable bin size –Able to support legends, titles, annotations etc –Able to select a range in 1D and 2D plots for zooming, fitting in range, cuts etc –Labels should resize to fit bounds –Support for functions, directly setting initial values (next page …)

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, Details - FreeHEP Plotter (continue)FreeHEP Plotter –User able to directly interact with objects, move them around (including outside plot boundaries) –Property pages and popup menus for customization –Arbitrary interactions between plot and data (rebinning, zooming etc.) –External objects should be able to insert (or delete) items into property pages, popup menus –Extensible using OO techniques (e.g. Specialized Axes) –Plot should be able to provide menus to external GUI –Saving/Restoring from XML –Real time updating –High performance (rapid updates)

Victor Serbo, SLACACAT’2002, Moscow, June 24-28, June 2002 Developers Workshop 2 Day “Users Workshop” 3 Day “Developer Workshop” –Items under discussion Fitting (two proposals, from SLAC, CERN) Improved plotting (IPlotter) Graph (XYData) Tuple chaining, merging Small updates/extensions to API –Input/Participation from new people welcomed!