I get an error and what caused it? - Function Plotting

I get an error. What caused it and how do I fix it?

Here my code:

t = -5:0.1:5;

y = ((2.*cos(x)+exp(-0.4.*x))./(0.2.*x+exp(-0.2.*x))) + ((4.*x)./3);

plot(t,y);

Edit: Typo correction.

[KSSV]

You have not shown us the values of x.

Answer 1

[KSSV]

Are you looking for this?

x = -5:0.1:5;
y = ((2.*cos(x)+exp(-0.4.*x))./(0.2.*x+exp(-0.2.*x))) + ((4.*x)./3);
plot(x,y);

[cikalekli]

Thanks and What does it mean "1 step increasing".

As far as I understood that I wrote -5:0.1:5 does it make 1 step?

Or Am I wrong sir?

For instance if we would want to 5 step increasing. What would we change inside it please?

[cikalekli]

I mean for 5 step increasing, did I have to write like -5 : 0.5 : 5 ?

[KSSV]

You can just print the values and see.

a = -5:0.1:5 ; % this creates numbers between -5 and 5 with step size 0.1
diff(a)

ans = 1×100

0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000 0.1000

Also have a look on linspace.

b = linspace(-5,5,5)

b = 1×5

-5.0000 -2.5000 0 2.5000 5.0000

If you want 5 as the step/ difference. YEs use:

c = -5:5:5

c = 1×3

-5 0 5

[cikalekli]

Your explanation was so fluently perfect.

I am appreciated with your help.

Bless you...