How to make Linear Interpolation

I have a room 12x12m². I placed data loggers in every 3 meters in order to measure temperature. Here the matrix I prepared:

How can I fill the zero values with linear interpolation to simulate room's representational view in surf plot?

Answer 1

[Shashank Prasanna]

I am assuming you are using a version of MATLAB atleast after R2012a. If not you can repeat the similar exercize using meshgrid and interp2.

% Actual Data
Z = [24.6,24.4,24;24.7,24.3,24;24.6,24.1,23.9]
[X,Y] = ndgrid([3,6,9],[3,6,9]);

% Interpolation
F = griddedInterpolant(X,Y,Z,'linear');
[Xnew,Ynew] = ndgrid(1:11,1:11);
Znew = F(Xnew,Ynew)
surf(Xnew,Ynew,Znew)

[Flashbond]

Thanks! One more thing; Also I have a Z2 humidity.

      Zh = [40.8,41.1,41.4;40.7,41,41.6;40.7,41.1,41.3]

Is it possible to make humidity is the height of suface plot and temperature are the colors? Or Should it be another question in the forum?