Figury

figure(1)

subplot(2,2,1)
x=(0:0.01:2.5)*pi
y=sin(2*x)
y1=sin(x).^2
y2=sin(x)
plot(x,y,'g*')
hold on
plot(x,y1,'b--')
plot(x,y2,'r+')

subplot(2,2,2)
t=(-0.01:0.01:2.5)*pi
y3=sin(3*t)
polar(t,y3,'r*')

subplot(2,2,3)
z=[1,2,3]
B=[2,4,7;6,7,6;7,8,9]
bar(z,B)

subplot(2,2,4)
k=[20 30 10 40]
pie(k)