PDE Toolbox: using numerical initial conditions

Can I use data points for my initial functions on a domain (as opposed to constant initial conditions, or function handles)? If so, how?

[Torsten]

Make your data points a function handle, e.g.

f = @(x,y) interp2(xdata,ydata,zdata,x,y)

[Polly Yu]

Thank you for your help!