MATLAB - Triangle inside a delaunay mesh

Question

I need your help in MATLAB for constructing a shape.

First I need to draw a triangular mesh ( delaunay). I would like to generate an inscribed triangle in each triangle of this mesh in such a way that the distance between the inscribed and mesh triangle lies between 0-1 ( using normal or lognormal distribution)...

So far I used the following program :

x = randn(1,12); y = randn(1,12); tri = delaunay(x,y);

t=randn(1,1)

for k=1:12 p1=[x(tri(k,1)),y(tri(k,1))]

p2=[x(tri(k,2)),y(tri(k,2))]

p3=[x(tri(k,3)),y(tri(k,3))]

P0 = (P1 +P2+P3(k))/3;

Q1 = t*P1(k)+(1-t)*P0;

Q2(k) = t*P2(k)+(1-t)*P0;

Q3(k) = t*P3(k)+(1-t)*P0;

end

It returns error to me as :

In an assignment A(I) = B, the number of elements in B and I must be the same.

I think it might be due to the fact that I am trying to save in P1, the array of 2 variables. However what I think is that I have to store the co-ordinates of each vertice of the triangle in some form.

Please guide me to solve this problem