1 %--------------sort-------------------------------
2 >> A=[9 3;8 2;1 5]
3 A =
4
5 9 3
6 8 2
7 1 5
8 >> B=sort(A,2)%A(:,1)<=A(:,2)
9 B =
10 3 9
11 2 8
12 1 5
13 %---------------END-----------------------------------
14 %--------------reshape-------------------------------
15 >> j=1:6;
16 >> NT=2;
17 >> A=reshape(j,NT,3)或者A=reshape(j',NT,3)
18 %讲一个行(列)向量转化为一个指定规模的矩阵(NT*3)
19 A =
20 1 3 5
21 2 4 6
22 %---------------END-----------------------------------
23 %--------------unique---------------------------------
24 >> node=[0 0;1 0;1 1;0 1];
25 >> elem=[1 2 4;2 3 4];
26 >> totalEdge=sort([elem(:,[2,3]);elem(:,[3,1]);elem(:,[1,2])],2);
27 >> totalEdge=sort([elem(:,[2,3]);elem(:,[3,1]);elem(:,[1,2])],2)
28 totalEdge =
29 2 4
30 3 4
31 1 4
32 2 4
33 1 2
34 2 3
35 >> [edge,i2,j]=unique(totalEdge,'rows')
36 edge = %去掉totalEdge中重复的边,edge(:,1)由小到大向下排
37 1 2
38 1 4
39 2 3
40 2 4
41 3 4
42 i2 =
43 5
44 3
45 6
46 4
47 2
48 j =
49 4
50 5
51 2
52 4
53 1
54 3
55 %--------------END------------------------------------
