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
|
## Copyright (C) 2024 David Legland
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are met:
##
## 1 Redistributions of source code must retain the above copyright notice,
## this list of conditions and the following disclaimer.
## 2 Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in the
## documentation and/or other materials provided with the distribution.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS''
## AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
## IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
## ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
## ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
## DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
## SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
## CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
## OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
##
## The views and conclusions contained in the software and documentation are
## those of the authors and should not be interpreted as representing official
## policies, either expressed or implied, of the copyright holders.
function [nodes2, edges2] = pruneGraph(nodes, edges)
%PRUNEGRAPH Remove all edges with a terminal vertex.
%
% [NODES2, EDGES2] = pruneGraph(NODES, EDGES)
%
% Example
% nodes = [...
% 10 30; 30 30; 20 45; 50 30; 40 15; 70 30; 90 30; 80 15; 100 45];
% edges = [1 2;2 3;2 4;4 5;4 6;6 7;6 8;7 8;7 9];
% figure;
% subplot(2, 1, 1); drawGraph(nodes, edges);
% axis equal; axis([0 110 10 50]);
% [nodes2, edges2] = pruneGraph(nodes, edges);
% subplot(2, 1, 2); drawGraph(nodes2, edges2);
% axis equal; axis([0 110 10 50]);
%
% See also
% graphs
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2015-02-19, using Matlab 8.4.0.150421 (R2014b)
% Copyright 2015-2023 INRA - Cepia Software Platform
nNodes = size(nodes, 1);
degs = grNodeDegree(1:nNodes, edges)';
termNodeInds = find(degs == 1);
[nodes2, edges2] = grRemoveNodes(nodes, edges, termNodeInds);
|
