From roden@oblio.Jpl.Nasa.Gov Fri Jan 28 17:18:39 1994 Return-Path: Received: from oblio.jpl.nasa.gov by galway.Jpl.Nasa.Gov (4.1/SMI-4.1+DXRs2.3) id AA29562; Fri, 28 Jan 94 17:18:38 PST Received: by oblio.jpl.nasa.gov (4.1/JPL-AIG-1.1) id AA03259; Fri, 28 Jan 94 17:18:33 PST Date: Fri, 28 Jan 94 17:18:33 PST From: roden@oblio.Jpl.Nasa.Gov (Joe Roden) Message-Id: <9401290118.AA03259@oblio.jpl.nasa.gov> To: pjs@galway.Jpl.Nasa.Gov Subject: SKICAT Training Data Status: RO Padhraic, At long last, I've got some SKICAT training data files ready for you. Sorry, I've been thrashing between numerous tasks, and this has been suffering from indefinite postponement- I need a better operating system for controlling my life. I've given you 2 data files- j.dat and f.dat. These files are in Usama's standard example file format; first line is # of examples, and each successive line is an example. Each example has: an example id, 8 attributes, and the class: s (star), g (galaxy), ss (binary star?), and sf (star w/ fuzz). F and J names of the files derive from the plate color, so they aren't j examples aren't really from the same distribution as f examples. The attributes are: Name Description ---- ----------- mag total magnitude scale resolution scale frac resolution fraction ellip ellipticity n_mcore normalized core magnitude n_larea normalized log of the isophotal area n_ir1 normalized intensity weighted first moment radius n_s normalized S where Area S = ----------------------------------------------------- log [ core luminosity / (9 x isophotal intensity) ] The data files (and some software) are on our machines in directory: /proj/skicat/for_pjs The software is a program called ex_select3, which is what we've been using to extract a subset of examples at random to form training/ testing sets. Compile it w/ a standard cc compile line- no hassles: cc ex_select3.c -o ex_select3 The file takes one parameter- a spec file which describes the train/ test files to create. A description of the spec file is in the file control_file_specs. An example (which you can probably use directly) is also provided, named select-in. Let me know if you have any questions. Good Luck! Joe