# Maximum value of matrix

조회 수: 2 (최근 30일)
mingcheng nie 2022년 10월 29일
댓글: mingcheng nie 2022년 10월 29일
Hi there,
If we have a complex matrix A, size of (N,M), is there any efficient way to keep the maximum 6 absolute values in A and set others to be zeros? like abs(A(n,m)), keep the top6 biggest one, then set rest to 0.

댓글을 달려면 로그인하십시오.

### 채택된 답변

Kevin Holly 2022년 10월 29일
% Generate random matrix
N = 34;
M = 23;
A = rand(N,M);
% Sort from highest to lowest
values = sort(abs(A(:)), 'descend')
values = 782×1
0.9998 0.9985 0.9980 0.9971 0.9965 0.9962 0.9950 0.9924 0.9914 0.9913
% top 6
values(1:6)
ans = 6×1
0.9998 0.9985 0.9980 0.9971 0.9965 0.9962
values(6)
ans = 0.9962
B = (A>=values(6)).*A
B = 34×23
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.9980 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.9985 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
imshow(B)
##### 댓글 수: 3이전 댓글 1개 표시이전 댓글 1개 숨기기
Kevin Holly 2022년 10월 29일
I would appreciate it if you could accept this answer.
mingcheng nie 2022년 10월 29일
sure definitely

댓글을 달려면 로그인하십시오.

### 카테고리

Help CenterFile Exchange에서 Logical에 대해 자세히 알아보기

R2022b

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by