How do I find the column of maximum values of a maxtrix?
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Let's say
x= [4, 90, 85, 75; 2, 55, 65, 75; 3, 78, 82, 79;...
1, 84, 92, 93]
x =
4 90 85 75
2 55 65 75
3 78 82 79
1 84 92 93
If using
[a, b]= max(x)
a will be the maximum values in each columns while b will be their position in terms of rows
I will get
a =
4 90 92 93
b =
1 1 4 4
If using
max(x, [], 'all')
I will get the highest value throughout the columns and rows which is 93.
Now, how do I find the column of the highest value (93) ? Maybe something like
[a, b]= max(x)
but the position/index is in terms of column.
0 commentaires
Réponse acceptée
Akira Agata
le 27 Mar 2020
Modifié(e) : Akira Agata
le 27 Mar 2020
If you want to find the column where the maximum value in 2D matrix locates, one simple way is:
[~,col] = max(max(x));
For example:
x= [4, 90, 85, 75; 2, 55, 65, 75; 3, 78, 82, 79;...
1, 84, 92, 93];
[~,col] = max(max(x));
>> col
col =
4
0 commentaires
Plus de réponses (1)
the cyclist
le 27 Mar 2020
Here is one way to do it.
[~,linearIndex] = max(x,[],'all','linear'); % First, find the *linear* index of x
[rowIndex,colIndex] = ind2sub(size(x),linearIndex); % Find the row and col indices from the linear index
Note that the first line could also have used the syntax
[~,linearIndex] = max(x(:))
0 commentaires
Voir également
Catégories
En savoir plus sur Logical dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!