Error when using find function
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
There are 2 matrix, A and B
A=[1
2]
B=[1
2
2]
% Check if the element in A is repeated at B
Check = find (B(:,1)==A)
%Error
%Unable to perform assignment because the left and right sides have a different number of elements.
Check = find (B(1:2,1)==A) %working fine
I need the value 2 in A to be compared with both value 2 in B. I was only manage to compre 2 element with 2 element. Is there any methos to achieve comparing array with 2 element with array with 3 element by using "find" fucntion? Thanks in advance.
0 Commenti
Risposte (2)
Walter Roberson
il 1 Gen 2021
%Unable to perform assignment because the left and right sides have a different number of elements.
That would give
Matrix dimensions must agree.
I need the value 2 in A to be compared with both value 2 in B.
find(B == A(2))
Is there any methos to achieve comparing array with 2 element with array with 3 element by using "find" fucntion?
>> [R,C] = find(B == A.')
R =
1
2
3
C =
1
2
2
Read that as B(1) = A(1), B(2) = A(2), B(3) = A(2)
But I have to wonder whether you really want to use find. I can't tell what you are really aiming to do with the information. I suggest you consider
>> [wasthere, idx] = ismember(B,A)
wasthere =
3×1 logical array
1
1
1
idx =
1
2
2
Or perhaps ismember(A,B) depending what you are trying to do.
5 Commenti
Paul
il 2 Gen 2021
As has been stated in two different answers, the function ISMEMBER is what you need. Have you looked at its documentation? If so and its not satisfactory, why not?
Stephen23
il 2 Gen 2021
This is a very odd definition of comparing two vectors: "A(1) compared with B(1), A(2) compared with B(2), A(2) once again compared with third element of B". In any case, neither find nor ismember will do that unusual comparison, you will have to DIY.
Vedere anche
Categorie
Scopri di più su Matrices and Arrays in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!