Question

Write as a MatLab script

For X=-2π~2π with intervals of π/100.
a. Plot Y1=sin(X) as a red line. Add a grid. b. Plot Y2=cos(X) as a black dotted line. Add a grid. c. Plot Y1 and Y2 in the same plot without using the hold on/off command. d. For Y3= Y1 times Y2, plot Y1, Y2 and Y3 in the same graph. Y3 will be green line. Add title, axis label and a legend.

Answer 1

%   MATLAB Program to plot multple functions on a same graph

X = -2*pi:pi/100:2*pi;

%   (a)
Y1 = sin(X);
plot(X,Y1,'r');
grid on;

%   (b)
Y2 = cos(X);
plot(X,Y2,'.-k');
grid on;

%   (c)
plot(X,Y1,'r',X,Y2,'.-k');
grid on;

%   (d)
Y3 = Y1 .* Y2;
plot(X,Y1,'r');
hold on
plot(X,Y2,'.-k');
plot(X,Y3,'g');
hold off
grid on;

title('Sin(x) & Cos(x)');
xlabel('x-axis');
ylabel('y-axis');
legend('Y1','Y2','Y3');