Distribution in Array

Hi..

Let say i have a array A=1:10; I want every element in array A to distribute into array C for n-times. C will be like this: (eg n=3)

C=[1 1 1 2 2 2 3 3 3 4 4 4 .... 10 10 10]

Is there any function to do that?

What i did was like this:

A=1:10;

n=1:3;

C=sparse(length(n),length(A));

for i=1:length(A) C(:,i)=A(i); end

C=reshape(C,1,length(A)*length(n));

And i'm not working with array's length of 10. Instead about 10000000 and every element to repeat itself 15 times. Really keen to avoid using 'for' loops but dont know how.

Im new to matlab. Thanks in advance for your help.

Answer 1

[Andrei Bobrov]

A = 1:10;
n = 3;
C = kron(A,ones(1,n));

Answer 2

[Jan]

A = 1:10;
n = 3;
B = reshape(repmat(A, n, 1), 1, []);

Answer 3

[Muhammad Affandi]

Thanks to both ans. But still it return ??? Out of memory. Type HELP MEMORY for your options.

Basically my work is like this:

A=1:16885575; n=16;

Both 'kron' and 'reshape' give out of memory statement. So any other alternative or suggestion?

[Oleg Komarov]

It should be repmat not reshape.

Also, consider that:

16885575 * 16 * (8 bytes) = 2.0129174 gigabytes

Do you have a contiguous block ot that size? Otherwise you'll keep getting that error.

The main question is, what do you need such an array for? Maybe you could use loops (why do you want to avoid them?).