Technical query on surf command

Hi

I have a technical question regarding surf command.

I wanted to know if I create a mesh grid having x & y values and create a function for getting z values for each of the points.

Then I have z values for each (x,y) . However when I plot, I see a single grid (square/rectangle) in the mesh represents one color but we have 4 values of z corresponding to one grid.

How does matlab know which value to use for getting the exact color value or does it do an average of z values and gets the corresponding color value.

Thanks

Sukrit

Answer 1

[Walter Roberson]

MATLAB chooses the color according to bilinear interpolation at the center of the face, using the information from the four corners of the face.

If you would prefer that interpolation not be done, that each input location corresponds to a color, then you should use texturemapping . The easiest way to do this kind of texture mapping is to use warp() instead of surf()

[Sukrit Ghorai]

Thankyou sir

[Steven Lord]

The description of the FaceColor, CData, and CDataMapping properties of a surface may be of interest.