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

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.

Answer 1

[Wan Ji]

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

[Wan Ji]

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).

Answer 2

[Yazan]

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

[MAzharul Islam]

Thanks. I wish I could accept both of Your answers, but..... I can't. Matlab doesn't allow it