Plot a "floating' 3D surface

Question

编辑： Stephen23 2015-7-9

Hi guys,

this is my issue.

I have a 40x40 Z matrix (named MUHAT_E) that I want to plot in a grid. So till here is simple:

x=linspace(0,1,40); y=linspace(0,1,40); [X,Y]=meshgrid(x,y); surf(X,Y,MUHAT_E)

The problem is that I don't like the result of this command:

I would like to get two things in this plot (if possible):

Remove the blue floor not plotting the zero values of the Z matrix.
Give a "floating" aspect to the matrix not connecting the edges of the red area with the zeros values.

With those two modifications I would be able to see the concavity of the function from below. Is that possible?. I attach the MUHAT_E matrix.

Thanks!!!.

Answer 1

Stephen23 2015-7-9

编辑：Stephen23 2015-7-9

Replace the zeros with NaNs, and they will not get plotted:

X = load('MUHAT_E.txt');
X(X==0) = NaN;
surf(X)

creates this figure: