X=(x0,x1,....,Xn0-1) ==> Xhat=(x0,x0,x0,x0, x1,x1,x1,x1, ........ ,Xn0-1,Xn0​-1,Xn0-1,X​n0-1), How can I copy like this in vector?

X=(x0,x1,....,Xn0-1) ==> Xhat=(x0,x0,x0,x0, x1,x1,x1,x1, ........ ,Xn0-1,Xn0-1,Xn0-1,Xn0-1)

How can I copy like in vector?

x0 was copied number of 4(or any number)

Answer 1

[Walter Roberson]

xhat = kron(X, ones(1,4))

[DongShin Yang]

Thank for your help.

Please, help me.

X= 1 2 3 4
Xhat = kron(X,ones(1,4))
Xhat = 1 1 1 1
       2 2 2 2
       3 3 3 3
       4 4 4 4
size(xhat) = 4x4

but

I want to chane Xhat like this

[1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4]
size(xhat) = 1x16

[Walter Roberson]

MATLAB does not have a syntax

X= 1 2 3 4

so that was not the way you created the vector.

The output you got tells me that your X is not a row vector like you asked in your question: your X is a column vector.

In the general case where you do not know whether you have a row vector or a column vector but you know for sure you want to end up with a row vector, then use

Xhat = kron(X(:).', ones(1,4))

or

Xhat = kron(reshape(X,1,[]), ones(1,4))

X(:).' and reshape(X,1,[]) do the same thing in different ways.