2 |
2 |
2 |
1 |
2 |
2 |
2 |
2 |
2 |
1 |
2 |
2 |
2 |
2 |
2 |
1 |
2 |
2 |
3 |
3 |
3 |
x |
3 |
3 |
2 |
2 |
2 |
1 |
2 |
2 |
2 |
2 |
2 |
1 |
2 |
2 |
在6*6的平面上2个点随机分布,有3种分布方式,2a1,2a2,2a3,占比为1:5:1.
3 |
3 |
3 |
2 |
3 |
3 |
3 |
3 |
3 |
2 |
3 |
3 |
1 |
1 |
1 |
x |
1 |
1 |
1 |
1 |
1 |
x |
1 |
1 |
3 |
3 |
3 |
2 |
3 |
3 |
3 |
3 |
3 |
2 |
3 |
3 |
在2a1上增加一个点,有3种分布方式,3a1,3a2,3a3,占比是5:2:10
5 |
5 |
3 |
3 |
5 |
5 |
5 |
5 |
3 |
3 |
5 |
5 |
4 |
4 |
x |
1 |
4 |
4 |
4 |
4 |
1 |
x |
4 |
4 |
5 |
5 |
3 |
3 |
5 |
5 |
5 |
5 |
3 |
3 |
5 |
5 |
4 |
4 |
1 |
1 |
4 |
4 |
4 |
4 |
1 |
1 |
4 |
4 |
4 |
4 |
1 |
1 |
4 |
4 |
6 |
6 |
x |
x |
6 |
6 |
4 |
4 |
1 |
1 |
4 |
4 |
4 |
4 |
1 |
1 |
4 |
4 |
同样的办法得到2a2+1和2a3+1.
把2a1+1,2a2+1,2a3+1代入1+1的表达式得到
在此基础上计算3a1+1
2 |
2 |
2 |
1 |
3 |
2 |
2 |
2 |
2 |
1 |
3 |
2 |
2 |
2 |
2 |
1 |
3 |
2 |
4 |
4 |
4 |
1 |
1 |
4 |
14 |
14 |
14 |
12 |
1 |
14 |
2 |
2 |
2 |
1 |
3 |
2 |
3a1+1把空间分成6部分,4a1,4a2,4a3,4a4,4a12,4a14,占比为4:16:4:4:1:4.所以如果在6*6的空间里已经有3个人排成3a1的结构,此时再来一个人,这个队伍最有可能变成4a2.
用同样的办法计算3a2+1,3a3+1,3a4+1,3a5+1,3a6+1
3a2+1
5 |
5 |
5 |
6 |
5 |
5 |
5 |
5 |
5 |
6 |
5 |
5 |
5 |
5 |
5 |
6 |
5 |
5 |
3 |
3 |
3 |
1 |
3 |
3 |
3 |
3 |
3 |
1 |
3 |
3 |
3 |
3 |
3 |
1 |
3 |
3 |
3a3+1
7 |
7 |
7 |
8 |
5 |
7 |
7 |
7 |
7 |
8 |
5 |
7 |
7 |
7 |
7 |
8 |
5 |
7 |
2 |
2 |
2 |
1 |
1 |
2 |
2 |
2 |
2 |
1 |
1 |
2 |
11 |
11 |
11 |
1 |
3 |
11 |
3a4+1
9 |
9 |
9 |
2 |
2 |
11 |
9 |
9 |
9 |
2 |
2 |
11 |
9 |
9 |
9 |
2 |
2 |
11 |
15 |
15 |
15 |
14 |
14 |
1 |
10 |
10 |
10 |
1 |
1 |
4 |
9 |
9 |
9 |
2 |
2 |
11 |
3a5+1
13 |
13 |
13 |
7 |
7 |
7 |
13 |
13 |
13 |
7 |
7 |
7 |
13 |
13 |
13 |
7 |
7 |
7 |
9 |
9 |
9 |
1 |
2 |
2 |
9 |
9 |
9 |
2 |
1 |
2 |
9 |
9 |
9 |
2 |
2 |
1 |
10 |
10 |
10 |
4 |
4 |
4 |
10 |
10 |
10 |
4 |
4 |
4 |
10 |
10 |
10 |
4 |
4 |
4 |
16 |
16 |
16 |
1 |
1 |
1 |
10 |
10 |
10 |
4 |
4 |
4 |
10 |
10 |
10 |
4 |
4 |
4 |
所以计算4人队形的所有组合就是计算1+1+1+1,因此把3a1+1,3a2+1,…,3a6+1代入
得到
化简
4个点16个结构的占比
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
0.0306 |
0.2445 |
0.0306 |
0.0306 |
0.0306 |
0.0015 |
0.1833 |
0.0229 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
0.1833 |
0.0306 |
0.0611 |
0.0038 |
0.0917 |
0.0306 |
0.0229 |
0.0015 |
所以在6*6的平面上4个人的队形最大概率为4a2,占比为24.45%其次是4a7和4a9占比都是18.33%,这3个分布就占总分布的61%。
2 |
- |
- |
- |
- |
- |
1 |
24.45% |
|||
2 |
1 |
1 |
- |
1 |
1 |
- |
||||
2 |
- |
- |
1 |
- |
1 |
- |
||||
2 |
- |
1 |
- |
- |
- |
- |
||||
2 |
- |
- |
- |
|||||||
2 |
||||||||||
7 |
- |
- |
1 |
- |
1 |
- |
18.33% |
|||
7 |
- |
- |
- |
- |
1 |
- |
||||
7 |
- |
- |
1 |
1 |
- |
- |
||||
7 |
1 |
- |
- |
- |
- |
1 |
||||
7 |
- |
1 |
- |
|||||||
7 |
||||||||||
9 |
- |
- |
1 |
- |
- |
- |
1 |
- |
18.33% |
|
9 |
- |
- |
- |
- |
1 |
1 |
- |
- |
||
9 |
- |
- |
- |
- |
- |
- |
- |
1 |
||
9 |
1 |
1 |
- |
- |
||||||
9 |
- |
- |
- |
1 |
||||||
9 |
而这3种分布看起来都可能很像人字形。
计算机验算,随机向6*6的区域内扔4个石子,扔了1000次,2000次
计算 |
1000 |
2000 |
|||||
1 |
0.0306 |
33 |
0.033 |
65 |
0.0325 |
||
2 |
0.2445 |
233 |
0.233 |
464 |
0.232 |
||
3 |
0.0306 |
40 |
0.04 |
82 |
0.041 |
||
4 |
0.0306 |
28 |
0.028 |
68 |
0.034 |
||
5 |
0.0306 |
39 |
0.039 |
82 |
0.041 |
||
6 |
0.0015 |
2 |
0.002 |
8 |
0.004 |
||
7 |
0.1833 |
208 |
0.208 |
413 |
0.2065 |
||
8 |
0.0229 |
34 |
0.034 |
71 |
0.0355 |
||
9 |
0.1833 |
150 |
0.15 |
310 |
0.155 |
||
10 |
0.0306 |
30 |
0.03 |
59 |
0.0295 |
||
11 |
0.0611 |
71 |
0.071 |
129 |
0.0645 |
||
12 |
0.0038 |
7 |
0.007 |
9 |
0.0045 |
||
13 |
0.0917 |
78 |
0.078 |
139 |
0.0695 |
||
14 |
0.0306 |
25 |
0.025 |
69 |
0.0345 |
||
15 |
0.0229 |
22 |
0.022 |
28 |
0.014 |
||
16 |
0.0015 |
0 |
0 |
4 |
0.002 |
和计算数据基本一致。