MATLAB Answers

Making a matrix of R*C size that takes the values randomly from an array- Y.

조회 수: 1(최근 30일)
MAzharul Islam
MAzharul Islam 2021년 8월 18일
댓글: MAzharul Islam 2021년 8월 18일
I want to make a random matrix of R*C size that takes the values randomly from an array Y.
For example I want to make a 7*8 matrix that takes value from this array Y = [ 1 6 1 8 4 5], and place them randomly in the matrix.. I have tried randi command to do this, but randi doesn't take fixed values like I have stated above.

채택된 답변

Wan Ji
Wan Ji 2021년 8월 18일
Hi, friend! randi is OK, it can help, look
Y = [ 1 6 1 8 4 5];
R = 7; C = 8;
indices = randi([1,numel(Y)], R, C);
A = Y(indices)
The result is
A =
8 1 5 4 4 4 1 1
1 1 8 1 1 5 6 1
5 1 1 1 6 1 1 1
8 1 8 5 1 1 4 5
5 1 8 8 1 1 8 8
5 8 1 8 8 6 6 1
1 1 5 1 4 4 8 4
Wish you will like it
  댓글 수: 1
Wan Ji
Wan Ji 2021년 8월 18일
Here, because 1 appears in Y array twice, its appearance possibility in matrix A is twice as much as other numbers( 6,8,4 and 5).

댓글을 달려면 로그인하십시오.

추가 답변(1개)

Yazan
Yazan 2021년 8월 18일
i1 = 7; i2 = 8;
y = [1 6 1 8 4 5];
randIdx = randi(length(y), 1, i1*i2);
data = reshape(y(randIdx), i1, i2)
data = 7×8
6 4 5 6 5 1 1 4 1 4 1 1 1 1 1 1 1 1 1 1 8 1 6 1 6 4 5 6 1 6 6 8 4 5 8 1 6 4 8 8 1 8 4 8 4 5 8 1 6 6 8 1 4 6 5 1
  댓글 수: 1
MAzharul Islam
MAzharul Islam 2021년 8월 18일
Thanks. I wish I could accept both of Your answers, but..... I can't. Matlab doesn't allow it

댓글을 달려면 로그인하십시오.

제품


릴리스

R2012a

Community Treasure Hunt

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

Start Hunting!

Translated by