ex3519.m

数字信号处理的MATLAB实现

%例35-19
f=@(x)x.^3-2*x-5
z=fzero(f,2)
x=0:0.1:4
f=@(x)x.^3-2*x-5
plot(x,f(x),'b',z,f(z),'rp')
axis([0,4,-100,100])
legend('f(x)','零点')