Heatmap from a matrix with scattered values

Hi!

I have measured temperatures in differents locations on one floor of a building. I would like to make a heatmap out of these values, but since the values are scattered I need to fill in the blank spots to see the temperature between my measurement points. I don't know how to do this two-dimensionally. How do I do this in MatLAB?

It is a 25x25 matrix which I have attached (Excel). I am already using this code to get a heatmap from my matrix.

    A = [25X25 matrix]; %Matrix to draw
    colormap('hot');   % set colormap
    imagesc(A);        % draw image and scale colormap to values range
    colorbar;          % show color scale

Answer 1

[Walter Roberson]

Newer releases:

http://www.mathworks.com/help/matlab/ref/scatteredinterpolant-class.html

http://www.mathworks.com/help/matlab/math/interpolating-scattered-data.html

Older releases:

http://www.mathworks.com/help/matlab/ref/griddata.html

http://www.mathworks.com/help/matlab/ref/triscatteredinterp.html