clear
clc
subplot(2,2,1), fplot('humps',[0 1])
subplot(2,2,2), fplot('abs(exp(-j*x*(0:9))*ones(10,1))',[0 2*pi])
subplot(2,2,3), fplot('[tan(x),sin(x),cos(x)]',2*pi*[-1 1 -1 1])
subplot(2,2,4), fplot('sin(1 ./ x)', [0.01 0.1],1e-3)