Plotting z = f(x, y) when (x, y, z) values are known

For an FEM question, I have meshed a plate with a circular hole, as shown below. I determined the temperature values at specific node locations and am trying to plot them on the surface. However, when I use the griddata function to interpolate the values in between, it also fills the hole area. Is there a way to create a surface plot without filling the hole?

Answer 1

[Walter Roberson]

Use https://www.mathworks.com/help/pde/ug/decsg.html to create a decomposed geometry.

Calculate the temperature values on the resulting mesh.

Use pdeplot to plot the 2D geometry, specifying the temperature values as XYData https://www.mathworks.com/help/pde/ug/pdeplot.html#btmrraf-XYData

[Mukul]

It worked! I used the mesh data in place of results.Mesh and temperature values as XYData. Thank you!

Is there a way to interoplate data in between points and also plot tempearture gradients and/or heat flux for apart from refining the mesh?

[Walter Roberson]

I suspect that for pdeplot() the data needs to align with the mesh nodes.