Merge arrays with different dimensions

Hello,

I have a small problem with an array.

I have an initial array with nx x ny positions, then I create another array with nx x ny positions, but I set only the Boundary values.

Afterward, I would like to merge the inner values from Tini (nx-2 x ny-2 positions, marked with a red rectangle in the picture below) into the inner area of the array T (marked with a blue rectangle in the image below).

nx=6;
ny=6;

Tini=300*ones(nx,ny) 

TL=400; 
TR=800; 
TT=600; 
TB=900; 

T(2:ny-1,1)=TL;
T(2:ny-1,nx)=TR;
T(1,2:nx-1)=TT;
T(ny,2:ny-1)=TB;

T(1,1)=(T(2,1)+T(1,2))/2;
T(nx,ny)=(T(nx-1,ny)+T(nx,ny-1))/2;
T(1,ny)=(T(2,ny)+T(1,ny-1))/2;
T(nx,1)=(T(nx-1,1)+T(nx,2))/2;

The array addition works only with the same dimensions, but I don't want to overwrite the boundary values of T when I add Tini.

I am not sure how to achieve this. Maybe someone has a clue.

Answer 1

[Torsten]

T(2:nx-1,2:ny-1) = Tini(2:nx-1,2:ny-1)