Using the outerjoin to join more than 2 tables

18 次查看（过去 30 天）
Mark Rodger
Mark Rodger 2018-1-30
评论： Devin kIM 2020-11-9
I want to join multiple tables together to make one table. I've used the outerjoin function to join 2 tables together(shown below). Is there anyway to join more than 2 tables using the outerjoin function.
c = outerjoin(data{1,1},data{1,3},'Keys','time','MergeKeys',true);
  2 个评论
Jan
Jan 2018-1-30
No, you did not use the outerjoin function, but the join function.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Jan
Jan 2018-1-30
编辑：Jan 2018-6-8
You can nest the joining:
outerjoin(A, outerjoin(B, C))
[EDITED] With a loop:
function Joined = MultiOuterJoin(varargin)
Joined = varargin{1};
for k = 2:nargin
Joined = outerjoin(Joined, varargin{k});
end
end
  3 个评论
显示 1更早的评论
Jan
Jan 2018-6-8
编辑：Jan 2018-6-8
@Nick George: No, I'm not joking. All I did was to show, that it is easy to call outerjoin multiple times. If this is done recursively of by a loop does not matter, because the point is the iterative joining.
See EDITED.
Devin kIM
Devin kIM 2020-11-9
I gotta agree with Nick on this one... This can be done in virtually all analysis languages, why is joining multiple tables not available in 2020b? Seems like something that should have been available a long time ago instead of adding more flashy features...

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Tables 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by