How to make the following contour plot in matlab?

Hi,

I want to make a contour plot looking similar to the one in the attached figure.In the figure, the contour is overlaid on the specimen by default by the software where the test was done.I have x,y co-ordinates of the pixels of the colored area as well as the value which the colors represents.

How can this be done separetely in matlab by importing the data?

The data is also attached.

Answer 1

[Cris LaPierre]

Try something like this.

data = readtable("Input1.xlsx","ReadVariableNames",false);

X = reshape(data.Var1,12,30);
Y = reshape(data.Var2,12,30);
Z = reshape(data.Var3,12,30);
contourf(X,Y,Z);
axis equal

Answer 2

[darova]

Here is a shot

I = imread('forest.tif');
[m,n] = size(I);
[X,Y] = meshgrid( linspace(1,n/2,20), linspace(1,m,20) );
X = X+n/4;
imshow(I)
hold on
h = surf(X,Y,X*0,...
    'edgecolor','none',...
    'faceAlpha',0.5,...
    'cdata',X-Y);
hold off
view(2)
colormap default