How to make manual upsampling?

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Carlos Martínez
Carlos Martínez 2016-8-18
I want to add a zeros vector each "w" elements of a given vector.
fs=20;
N=50;
T=1/fs;
n=0:1:N-1;
x = exp(-0.5*n*T).*sin(2*pi*n*T);
A=zeros(1,M);
for i = length(x)
y()=A %Here is where I don't know that to do
end
stem(y)
So As an example if M=2, A=[0 0 0] and if x=[1 2 3] with w=1.
y=[1 0 0 0 2 0 0 0 3 0 0 0];

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