Joining two tables with two common columns
10 views (last 30 days)
Show older comments
Hi ,
I have two tables A and B. They have two common columns:
A's columns are Date, ID, col1, col2 etc...
B's columns are Date, X1, ID, X2 etc....
Columns 1 and 2 of A match columns 1 and 3 from B. "tried join, innerjoin functions and received errors probably because A and B have multiple columns that are different:. My question is how to produce table C that has every row in A and the rows of B that match those of A .So C would be somethings like [ Date,ID, col1,col2 ,X2,X2,etc...];I don't want the columns 1 and 3 in B to be reproduced (so, I don't want C to appear like [ Date1,ID1, col1,col2 ,Date2,ID2,X2,X2,etc...] and I want the rows of A that are not matched by B to have nans .
I am wondering what is the right command for this :
Dor example I tried
C= innerjoin(A,B,,'LeftKeys',[1,2],'RightKeys',[1,3]);
I received:
Error: Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for
mismatched delimiters.
2 Comments
dpb
on 21 Jun 2020
The error message is just a syntax problem -- you've got an extra comma in there...
I've never wrapped my head around inner/outer join so whether it'll do what you want or not I dunno', but
C= innerjoin(A,B,'LeftKeys',[1,2],'RightKeys',[1,3]);
should at least produce something...
Answers (0)
See Also
Categories
Find more on Matrix Indexing in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!