根据时间值合并2个向量 [英] Merge 2 vectors according their time values

问题描述

我想根据它们的时间值合并2个向量.看起来应该像这样(第1列=时间，第2列=实际值):

I would like to merge 2 vectors according their time values. This should look like this (column 1 = time, column 2 = actual value):

A =

           1         234
           3         121
           4         456
           6        6756

B =

           2         435
           5          90
          10         365

结果:

C =

           1         234
           2         435
           3         121
           4         456
           5          90
           6        6756
          10         365

在Matlab中是否有一种优雅的方法来实现这一点?

Is there an elegant way to realize this in Matlab?

推荐答案

这里很简单:

C = sortrows([A;B])

C =

      1    234
      2    435
      3    121
      4    456
      5     90
      6   6756
     10    365

请注意，这假设第1列中的所有时间值都是唯一的.如果不是这种情况，则可以使用accumarray:

Note that this assumes that all of the time values in column 1 are unique. If this is not the case, you can use accumarray:

A =

      1    234
      3    121
      4    456
      6   6756

B =

     2   435
     5    90
    10   365

B = [B; 1 512]
B =

     2   435
     5    90
    10   365
     1   512

C = [A;B];
D = accumarray(C(:,1),C(:,2));
U = unique(C(:,1));
E = [U,D(U)]
E =

      1    746    %// 764 = 234 + 512
      2    435
      3    121
      4    456
      5     90
      6   6756
     10    365

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