MATLAB: Colormap color levels on cursor

Question

I have a 3 column matrix which is x,y, and C. x and y values are coordinates and C value is intensity. I plot a diagram with using "patch" command.

On figure i just get x and y values on cursor. I want to see intenstiy values on colormap. How can i do it?

Note:

I have tried before meshgrid and countourf but it takes a lot of time to create figure because i have many data points. I use for loop for every rectangle so it takes a lot of time. When i do not use for loop it creates a wrong shape.

Anyone can help me?

Answer 1

Here is direction

You have position of cursor in variable pos

You can access to FaceVertexCData with command

get(h,'FaceVertexCData')

You can access to XY data too:

get(h,'Vertices')

So all you have to do is to find some connection between all this data. Find index of pos in Vertices data and use it to display FaceVertexCData