【matlab】利用sortrows进行Z字形扫描

最新推荐文章于 2021-03-23 18:59:53 发布

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#matlab #Z字形扫描

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本文介绍了如何在MATLAB中利用sortrows函数进行Z字形扫描，详细阐述了sortrows的基本语法，包括按升序排序矩阵的行以及基于指定列进行多列排序的方法。同时，也提及了reshape函数的使用，用于矩阵的重塑，通过sz1,...,szN参数重新定义矩阵的尺寸，以适应不同场景的需求。" 112942271,10538603,Python连接Oracle数据库实战指南,"['Python开发', '数据库连接', 'Oracle数据库', 'Linux系统', 'Windows系统']

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Syntax of sortrows

B = sortrows(A) sorts the rows of A in ascending order. For strings, this is the familiar dictionary sort.

B = sortrows(A,column) sorts matrix A based on the columns specified in the vector, column. This input is used to perform multiple column sorts in succession.

[B,index] = sortrows(_) also returns an index vector using any of the previous syntaxes. The index vector satisfies B = A(index,:).

Systax of reshape

B = reshape(A,sz1,…,szN) reshapes A into a sz1-by-…-by-szN array where sz1,…,szN indicates the size of each dimension. You can specify a single dimension size of [] to have the dimension size automatically calculated, such that the number of elements in B matches the number of elements in A. For example, if A is a 10-by-10 matrix, then reshape(A,2,2,[]) reshapes the 100 elements of A into a 2-by-2-by-25 array.

>> order = [ 0  1  5  6  14 15 27 28
             2  4  7  13 16 26 29 42
             3  8  12 17 25 30 41 43
             9  11 18 24 31 40 44 53
             10 19 23 32 39 45 52 54
             20 22 33 38 46 51 55 60
             21 34 37 47 50 56 59 61
             35 36 48 49 57 58 62 63];
>>  q =  [16 11 10 16 24  40  51  61 
          12 12 14 19 26  58  60  55
          14 13 16 24 40  57  69  56
          14 17 22 29 51  87  80  62
          18 22 37 56 68  109 103 77
          24 35 55 64 81  104 113 92
          49 64 78 87 103 121 120 101
          72 92 95 98 112 100 103 99];
>>  C = sortrows([reshape(q,[],1) reshape(order,[],1)],2)

>> C(:,1)'
ans =

  1 至 21 列

    16    11    12    14    12    10    16    14    13    14    18    17    16    19    24    40    26    24    22    22    24

  22 至 42 列

    49    35    37    29    40    58    51    61    60    57    51    56    55    64    72    92    78    64    68    87    69

  43 至 63 列

    55    56    80   109    81    87    95    98   103   104   103    62    77   113   121   112   100   120    92   101   103

  64 列

    99