Using the outerjoin to join more than 2 tables

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 commentaires

Jan
Jan le 30 Jan 2018
No, you did not use the outerjoin function, but the join function.
Mark Rodger
Mark Rodger le 30 Jan 2018
Yeah, meant to say join instead of outerjoin

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Réponses (1)

Jan
Jan le 30 Jan 2018
Modifié(e) : Jan le 8 Juin 2018
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 commentaires

Nick George
Nick George le 7 Juin 2018
Modifié(e) : Nick George le 7 Juin 2018
is this a joke? this is the best solution matlab offers for a very common operation? This answer https://www.mathworks.com/matlabcentral/answers/404380-outer-join-of-multiple-tables is nicer than nesting... but it is still a loop. Both python and r allow passing lists of data frames/tables as an argument to *_join.. I am surprised..
Jan
Jan le 8 Juin 2018
Modifié(e) : Jan le 8 Juin 2018
@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 le 9 Nov 2020
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...

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le 9 Nov 2020

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