3 * Jalview - A Sequence Alignment Editor and Viewer (Version 2.7)
4 * Copyright (C) 2011 J Procter, AM Waterhouse, J Engelhardt, LM Lui, G Barton, M Clamp, S Searle
6 * This file is part of Jalview.
8 * Jalview is free software: you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
12 * Jalview is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along with Jalview. If not, see <http://www.gnu.org/licenses/>.
19 <head><title>Search</title>
20 <style type="text/css">
30 <p><strong>Search</strong></p>
31 <p>The search box is displayed by pressing Control and F or
32 selecting "Find..." from the "Search" menu.</p>
33 <img src="search.gif" width="339" height="110">
34 <p>"Find next" will find the next occurence of the specified and adjust
35 the alignment window view to show it, and "Find all" highlights all
36 matches for a pattern. The "New Feature" is a quick way to highlight
37 and group residues matching the specified search pattern throughout the alignment.
39 <li>The search uses regular expressions. (understands a mixture of posix and
40 perl style regex - see below for a summary)</li>
41 <li>Gaps are ignored when matching the query to the sequences in the alignment.</li>
42 <li>The search is applied to both sequences and their IDs.</li>
43 <li>If a region is selected, then search will <strong>only</strong> be performed
45 <li>To quickly clear the current selection, press the "Escape" key.</li>
46 <li>Tick the "Match Case" box to perform a case sensitive search.</li>
48 <p><strong>Creating Features from Search Results</strong></p>
50 If "New Feature" is selected, the feature can be given a name from
51 a popup input box. Use the "Feature Settings" under the "View"
52 menu to change the visibility and colour of the new sequence feature.</p>
53 <p><strong>A quick Regular Expression Guide</strong></p>
54 <p>A regular expression is not just a simple text query - although it
55 can be used like one, the query is not parsed literally, but
56 interpreted like a series of instructions defining the features of the
57 match. For example, a simple query like "ACDED" would
58 match all occurences of that string, but "ACD+ED" matches
59 both 'ACDDED' and 'ACDDDDDDDDED'. More usefully, the query
60 "[ILGVMA]{;5,}" would find stretches of small,
61 hydrophobic amino acids of at least five residues in length.
64 below describes some of the regular expression syntax:<br></p>
65 <table width="100%" border="1">
67 <td width="24%">Regular Expression Element</td>
68 <td width="76%">Effect</td>
71 <td width="24%">.</td>
72 <td width="76%">Matches any single character</td>
76 <td>Matches any one of the characters in the brackets</td>
80 <td>Matches at the start of an ID or sequence</td>
84 <td>Matches at the end of an ID or sequence</td>
88 <td>Matches if the preceding element matches zero or more times</td>
92 <td>Matches if the preceding element matched once or not at all</td>
96 <td>Matches if the preceding element matched at least once</td>
100 <td>Matches if the preceding element matches a specified number of
106 <td> Matches of the preceding element matched at least the
107 specified number of times</td>
111 <td>Matches if the preceding element matches min or at most max