# Matching unequal cell arrays

4 views (last 30 days)
Ronald on 3 Jun 2020
Commented: Ronald on 5 Jun 2020
I have two unequal arrays and I want to match them to produce one array such that the unmatched cells are left empty i.e
A = {124,252,1252,225,598,999}
B = {598,'plant';
1252,'nil';
252,'blue'}
The result C;
C = {124,[];
252,'blue';
1252,'nil';
225,[];
598,'plant';
999,[]}

A = {124,252,1252,225,598,999};
B = {598,'plant';...
1252,'nil';...
252,'blue'};
[~, Ai_member, Bi_member] = intersect([A{:}], [B{:,1}]);
C = [A(:), cell(numel(A), 1)];
[C{Ai_member, 2}] = B{Bi_member, 2}
Ronald on 5 Jun 2020
This is really good. Thank you very much!

Stephen23 on 4 Jun 2020
Edited: Stephen23 on 4 Jun 2020
Using tables:
>> TA = cell2table(A(:))
TA =
Var1
____
124
252
252
1252
225
225
598
598
999
>> TB = cell2table(B'')
TB =
Var1 Var2
____ _______
598 'plant'
1252 'nil'
252 'blue'
>> T = outerjoin(TA,TB,'MergeKeys',true)
T =
Var1 Var2
____ _______
124 ''
225 ''
225 ''
252 'blue'
252 'blue'
598 'plant'
598 'plant'
999 ''
1252 'nil'
Note that the output rows are sorted by the joining key. To keep the original order:
>> [T,X] = outerjoin(TA,TB,'MergeKeys',true);
>> T(X,:) = T
T =
Var1 Var2
____ _______
124 ''
252 'blue'
252 'blue'
1252 'nil'
225 ''
225 ''
598 'plant'
598 'plant'
999 ''

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