close all

%plotting
figure(1)
x1=-10:.1:10;
y1=sin(x1);
plot(x1,y1)
title('sine of x')
xlabel('x vals')
ylabel('y vals')

hold on
x2=linspace(-10,10,64);
y2=sin(x2);
plot(x2,y2,'y--')

x3=[-9 -4 0 1 2 7];
y3=sin(x3);
plot(x3,y3,'c')

figure(2)
plot(x1,y1,'rd',x2,y2,x3,y3,'g')
legend('first','second','third',2)

figure(3)
subplot(3,2,1)
plot(x1,y1)

subplot(3,2,2)
plot(x2,y2)

subplot(3,2,3)
plot(x3,y3)


%saving data
save A1.dat x1 -ASCII

%printing figures
figure(1) %makes fig1 the current figure
print -djpeg fig1.jpg