Finding the index of spesific element in a matrix?
690 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
IBM watson
el 23 de Mayo de 2019
Comentada: Ulika Naidoo
el 22 de En. de 2021
Lets say we have matrix:
a=[ 2, 3, 5
3, 4, 7
4, 4, 4] ;
I want to know index of a(4) which is the bold 3. This is just an example. I want to learn how to find index of a(n).
0 comentarios
Respuesta aceptada
madhan ravi
el 23 de Mayo de 2019
Editada: madhan ravi
el 23 de Mayo de 2019
Assuming you want to index of the last match in the matrix:
Index=find(a==3,1,'last')
13 comentarios
madhan ravi
el 23 de Mayo de 2019
Editada: madhan ravi
el 23 de Mayo de 2019
No problem, by the way the original question you asked is totally irrelevant to your latter comment. Please don’t do this in the future riddling the answers.
Look into ind2sub() function to convert the linear indices. To understand what this statement means , you need to read the link which I shared thoroughly and practice. And finally have a look at ind2sub().
Más respuestas (1)
KALYAN ACHARJYA
el 23 de Mayo de 2019
Editada: KALYAN ACHARJYA
el 23 de Mayo de 2019
I want to know index of a(4) which is the bold 3
here ......................... this 4^ represent the index, I guessing you are looking for following one.
idx=find(a==3);
One dimentional case array case
>> a=[2,3,5,3,4,7,4,4,4];
>> idx=find(a==7)
idx =
6
>> idx=find(a==3)
idx =
2 4
But Matrices have 2 dimention so indices represents (x,y), where answer will be little different
>> a=magic(3)
a =
8 1 6
3 5 7
4 9 2
>> [r c]=find(a==3)
r =
2
c =
1
5 comentarios
Ver también
Categorías
Más información sobre Matrices and Arrays en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!