Matlab Plotting command problem

Hello,

I am having issues plotting a plot in Matlab with the following code below.

t=0:0.01:10

t = 1×1001

0 0.0100 0.0200 0.0300 0.0400 0.0500 0.0600 0.0700 0.0800 0.0900 0.1000 0.1100 0.1200 0.1300 0.1400 0.1500 0.1600 0.1700 0.1800 0.1900 0.2000 0.2100 0.2200 0.2300 0.2400 0.2500 0.2600 0.2700 0.2800 0.2900

x1=11*cos(10*t+(3*pi/8));

plot(t,x1);

hold on

x2=3*cos(10*t-(pi/2));

plot(t,x2);

hold on

x3=x1+x2;

plot(t,x3);

legend('x1(t)=11*cos(10*t+(3*pi/8))','x2(t)=3*cos(10*t-(pi/2))','x3(t)=x1+x2');

title('2.c)');

For some reason when ever I run the above I get the following error and I am unable to determine what is wrong. I tried changing the wording of the plot commands just incase they had a problem but that didn't resolve the issue.

Any help is appreciated Thanks for your time!

[Matt J]

I get the following error

You seem to have omitted it.

[Jacob]

Yes I apologize but what you guys have given me solved my issue

Thanks!

Answer 1

[Sulaymon Eshkabilov]

Even though you have not mentioned any error, there is a tiny point linked with hold on command. It needs to be followed at the end with hold off to avoid ambiguity in case you'd plot a new set of data afterwards. And use of latex for legend labels might make the plot figure better look, etc., e.g.:

figure()
t=0:0.01:10;
x1=11*cos(10*t+(3*pi/8));
plot(t,x1, 'r','LineWidth',1.5);
hold on
x2=3*cos(10*t-(pi/2));
plot(t,x2, 'g:','LineWidth',2.5);
hold on
x3=x1+x2;
plot(t,x3, 'b-.', 'LineWidth',2.0);
legend({'$x_1(t)=11*cos(10*t+(3*pi/8))$','$x_2(t)=3*cos(10*t-(pi/2))$','$x_3(t)=x_1+x_2$'}, 'Interpreter','latex');
title('(2.c)');
xlabel('$t$', 'Interpreter','latex')
ylabel('$x_1(t), x_2(t), x_3(t)$', 'Interpreter','latex')
grid on
hold off   % Use hold off not to plot over this figure

[Jacob]

This solved my issue.

Thanks For your help!

[Sulaymon Eshkabilov]

Most welcome!