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

    %% Specify Plotting Interval
% Plot the function $x^2 + y^2 - 3 = 0$ over the intervals |[-3 0]| for |x| 
% and |[-2 2]| for |y|.

f = @(x,y) x.^2 + y.^2 - 3;
fimplicit(f,[-3 0 -2 2])