Need help graphing this

How do you graph y = cosx and y = 5 + cosx over the interval [0,4pi]?

I also want to use the command "ylim([-2,7]) in order to view the graph clearly.

I just installed Matlab and it is my first time using this software. Thanks

[Joseph Wilson]

Will need to create a array of x values to plot against. Something like x = 0:pi/4:4*pi;... Might need a tighter interval (middle value in equation) for a smoother plot so maybe pi/12 or smaller.

Will need to create two equations with those values: y1 = cos(x); y2=5+cos(x);

Use plot command with those arrays. 2 ways to do this:

1: plot(x,y1,x,y2);

2: plot(x,y1); hold on; plot(x,y2); This method is usually prefered for ease of changing line styles and colors.

Type "doc plot' into command window and hit enter for more information on line styles and colors

lastly just use ylim([-2,7]); to change the limits of the graph.

hold on makes sure it plots on the same graph without erasing previous plotting.

Answer 1

[VBBV]

x = 0:0.01:4*pi;
plot(x,cos(x));hold on;
plot(x,5+cos(x));
ylim([-2 7])

[Rik]

If you're using the legacy editor (e.g. because you are on mobile) you can start a code block with two space after a blank line (or start the first line with two spaces).

Answer 2

[Rik]

The Onramp tutorial will guide you through problems like this and will teach you the Matlab basics.

[Eric Andre]

great ill look into it right now, thanks!