Time Scaling In Discrete Time Signals

Hello everyone. I want to apply time scaling property to my signal. It is hard for me to apply for the signals especially like x[4n], x[2n], x[1/3n]. I know there must be mod calculation because the values should be integer but i could not write the code can someone help me please?

n=[-2 -1 0 1 2 3 4];

x=[3 1 0 4 6 2 9];

Answer 1

[Setsuna Yuuki.]

n=[-2 -1 0 1 2 3 4];
x=[3 1 0 4 6 2 9];
stem(n,x);hold on; %original
n2 = 4*n;
stem(n2,x); %x4
n3 = 2*n;
stem(n3,x);%x2

to x[1/3n] I don't know :(

[enrique128]

I don't know too and the point is that. I just guess that we'll use mod :)

[Foysal Ahmmed]

okey. but the figure should include 0 amplitude for the rest of the integer sample value. Again we cant find x[n/2] this way. because they includes fraction sample n=1.5 .

[Luke Ramel]

this is wrong, since if we have a multiplier of 2 to the time (n) the x-axis values should be divided by 2 since we are scaling time.