Matlab【中的空数组与子数组】 

 1 k = magic(4) //魔方函数
 2 
 3 k =
 4 
 5     16     2     3    13
 6      5    11    10     8
 7      9     7     6    12
 8      4    14    15     1
 9 
10 m=k(2:end,2:end)  //子数组
11 
12 m =
13 
14     11    10     8
15      7     6    12
16     14    15     1
 1 linspace(1,100,50)  //1-100生成50个数
 2 
 3 ans =
 4 
 5   1 至 11 列
 6 
 7     1.0000    3.0204    5.0408    7.0612    9.0816   11.1020   13.1224   15.1429   17.1633   19.1837   21.2041
 8 
 9   12 至 22 列
10 
11    23.2245   25.2449   27.2653   29.2857   31.3061   33.3265   35.3469   37.3673   39.3878   41.4082   43.4286
12 
13   23 至 33 列
14 
15    45.4490   47.4694   49.4898   51.5102   53.5306   55.5510   57.5714   59.5918   61.6122   63.6327   65.6531
16 
17   34 至 44 列
18 
19    67.6735   69.6939   71.7143   73.7347   75.7551   77.7755   79.7959   81.8163   83.8367   85.8571   87.8776
20 
21   45 至 50 列
22 
23    89.8980   91.9184   93.9388   95.9592   97.9796  100.0000
linspace
1 logspace(1,4,4) //
2 
3 ans =
4 
5           10         100        1000       10000
logspace
 1 k=1:1:9
 2 
 3 k =
 4 
 5      1     2     3     4     5     6     7     8     9
 6 
 7 >> reshape(k,3,3)
 8 
 9 ans =
10 
11      1     4     7
12      2     5     8
13      3     6     9
reshape

 1 >> year(now)
 2 
 3 ans =
 4 
 5         2018
 6 
 7 >> month(now)
 8 
 9 ans =
10 
11      3
12 
13 >> day(today)
14 
15 ans =
16 
17     29
时间函数

 

posted @ 2018-03-29 20:41  Justice-V  阅读(1007)  评论(0)    收藏  举报