combining matricies with common values

Question

ma sd 2020-5-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/531418-combining-matricies-with-common-values

编辑： the cyclist 2020-5-23

i am trying to create a matrix by combining two matricies however, i want to combine them by maching elements from both matricies such as

a=[1 2;
   1 4;
   5 8]
b=[4 4;
   8 9;
   2 9]
combined=[4 1;
          8 5;
          2 1]

i know that this should be simple but i have just started learning matlab and i wasnt able to figure it out

2 个评论
显示无隐藏无

Stephen23 2020-5-23

@ma sd: please explain the rules that you used to "combine" those matrices.

ma sd 2020-5-23

i was using the second column form a matched with the first column from b

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

the cyclist 2020-5-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/531418-combining-matricies-with-common-values#answer_437203

编辑：the cyclist 2020-5-23

在 MATLAB Online 中打开

I'm not certain this is what you want, but this is my best guess:

[tf,idx] = ismember(b(:,1),a(:,2))
complete = [a(idx,2) a(idx,1)];

It seems like you are almost trying to use the fewest words possible to describe your question. Instead, you should try to give a complete, detailed description of what you are trying to do, so that we don't have to guess.

2 个评论
显示无隐藏无

ma sd 2020-5-23

i apologize for that what i was trying to explain is hat i have two matricies that i want to merge by matching the second column from a with the first column from b. the resultant i want is a matrix with two columns, the first being the matched value and the second is the first column from a.