Improving resolution for a surf plot in MATLAB

I am using the SURF command to represent some data. I want to plot the surface of a disc in a 3d chart.

The only problem is that my data is in a 9x9 format, this naturally results in a square looking surface. I’d like for the resulting surface to look like a circle.

Is there way to “cut off” the edges somehow?

[Todd Flanagan]

Hi, I moved your answer to a comment on Doug's answer. That's a good place for that sort of back and forth.

Answer 1

[Sean de Wolski]

Interpolate to refine your mesh.

doc interp3

[Walter Roberson]

Or griddata(). Or the Matlab File Exchange contribution gridfit()

Answer 2

[Doug Hull]

NaN does not get shown in a surf plot.

a = magic(10)
a([1,2,11,90,99,100]) = NaN
surf(a)
view(2)

[Todd Flanagan]

Raygereio says, "Thanks. That is a step in the right direction, but not quite what I was hoping for.

With my 9x9 dataset, this results is somewhat ugly looking jagged edges. Is there any way to produce a more smoother looking circle?"

[Doug Hull]

There is only so much you can do with that coarse of data. Can you sample more data?

[Hussain]

Is it possible then to implement a smooth curve at the rough edges? I ask in a general sense when larger data sets are in question.