Looking for function that only updates axes in GUI

Hi all,

I have an axes object in my Matlab GUI, that plots a series of 3D
coordinates using real-time data.

Currently I've been able to get the plot to update along with the
real-time data by calling drawnow, but it's kind of slow.

Are there any functions in Matlab that can allow me to only update
the axes, instead of redrawing the entire GUI window?

Thanks a lot!

Cindy
.