How do I plot colored temperature distribution on a rectangular plate?

I have the data for temperature at every point and I want continuous colored plot corresponding to each temperature. Say, red for 100 degC and blue for 0 degC.

Answer 1

[buzz]

Let's suppose "plate" is the temperature distribution.

[M,N] = size(plate);
%Pay attention: 
%   M --> raws    N --> coloumns
%BUT for meshgrid you must introduce (x,y) coordinates, so:
%   M --> y       N--> x

[x,y] = meshgrid(1:N,1:M); 
surf(x,y,plate);

If plate would exceed [0-100] bounds, you could use a support variable:

plate_2 = plate;
plate_2(plate_2>100) = 100;
plate_2(plate_2<0) = 0;
surf(x,y,plate_2);

[Shubham Maurya]

r=-5:.2:5; [X,Y]=meshgrid(r,r); Z=30-2*X; pcolor(Z) Suppose, I want to label each color in the plot. How to do it?

[Shubham Maurya]

r=-5:.2:5;

[X,Y]=meshgrid(r,r);

Z=30-2*X;

pcolor(Z)

I want to label each color in the plot. How to do it. Thanks