www.gusucode.com > graphics 案例源码程序 matlab代码 > graphics/SpecifyPlottingIntervalforImplicitSurfaceExample.m

    %% Specify Plotting Interval
% Plot the upper half of the hyperboloid  $x^2 + y^2 - z^2 = 0$ by
% specifying the plotting interval as [0 5] for _z_. For  _x_ and  _y_, use
% the default interval |[-5 5]|.

f = @(x,y,z) x.^2 + y.^2 - z.^2;
interval = [-5 5 -5 5 0 5];
fimplicit3(f,interval)