/usr/share/doc/stilts/sun256/AnisotropicCartesianMatchEngine.html is in stilts-doc 3.1.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | <html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="sun-style.css">
<title>2d_anisotropic, ...:
Anisotropic Cartesian Matching
</title>
</head>
<body>
<hr>
<a href="CuboidCartesianMatchEngine.html">Next</a> <a href="IsotropicCartesianMatchEngine.html">Previous</a> <a href="MatchEngine.html">Up</a> <a href="index.html">Contents</a> <br> <b>Next: </b><a href="CuboidCartesianMatchEngine.html">2d_cuboid, ...:
Cuboid Cartesian Matching</a><br>
<b>Up: </b><a href="MatchEngine.html">Match Criteria</a><br>
<b>Previous: </b><a href="IsotropicCartesianMatchEngine.html">1d, 2d, ...:
Isotropic Cartesian Matching</a><br>
<hr>
<h4><a name="AnisotropicCartesianMatchEngine">7.1.7 <code>2d_anisotropic</code>, ...:
Anisotropic Cartesian Matching</a></h4>
<p><pre>matcher=2d_anisotropic values*='<x> <y>'
params='<error-in-x> <error-in-y>'
tuning='<bin-factor>'</pre>
<blockquote>
<dl>
<dt><strong><code>values*</code>:</strong></dt>
<dd>
<ul>
<li><code>x</code>: Cartesian co-ordinate #1
</li>
<li><code>y</code>: Cartesian co-ordinate #2
</li>
</ul>
</dd>
<dt><strong><code>params</code>:</strong></dt>
<dd>
<ul>
<li><code>error-in-x</code>: Axis length of error ellipse in Cartesian co-ordinate #1 direction
</li>
<li><code>error-in-y</code>: Axis length of error ellipse in Cartesian co-ordinate #2 direction
</li>
</ul>
</dd>
<dt><strong><code>tuning</code>:</strong></dt>
<dd>
<ul>
<li><code>bin-factor</code>: Scaling factor to adjust bin size; larger values mean larger bins
</li>
</ul>
</dd>
</dl>
</blockquote>
</p>
<p>The <code>2d_anisotropic</code> matcher compares positions in
2-dimensional Cartesian space using an anisotropic metric.
Rows are considered to match if their (<code>x</code>,<code>y</code>)
positions fall within an error ellipse with axis lengths
<code>error-in-x</code>, <code>error-in-y</code> of each other.
This kind of match will typically be used for non-'spatial' spaces,
for instance (magnitude,redshift) space, in which the metrics along
different axes are not related to each other.
</p>
<p>Matching in any number of dimensions of Cartesian space using an
anisotropic metric can be done by extending this syntax in the obvious way.
</p>
<hr><a href="CuboidCartesianMatchEngine.html">Next</a> <a href="IsotropicCartesianMatchEngine.html">Previous</a> <a href="MatchEngine.html">Up</a> <a href="index.html">Contents</a> <br> <b>Next: </b><a href="CuboidCartesianMatchEngine.html">2d_cuboid, ...:
Cuboid Cartesian Matching</a><br>
<b>Up: </b><a href="MatchEngine.html">Match Criteria</a><br>
<b>Previous: </b><a href="IsotropicCartesianMatchEngine.html">1d, 2d, ...:
Isotropic Cartesian Matching</a><br>
<hr><i>STILTS - Starlink Tables Infrastructure Library Tool Set<br>Starlink User Note256<br>STILTS web page:
<a href="http://www.starlink.ac.uk/stilts/">http://www.starlink.ac.uk/stilts/</a><br>Author email:
<a href="mailto:m.b.taylor@bristol.ac.uk">m.b.taylor@bristol.ac.uk</a><br>Mailing list:
<a href="mailto:topcat-user@jiscmail.ac.uk">topcat-user@jiscmail.ac.uk</a><br></i></body>
</html>
|