how to calculate functions

syms t

t =  -3:0.1:10;
y = 4*sin(2*pi*t) + exp(-t)/t;

tlim = ([-1 10]);

Out = subs(y);
vpa_Out =vpa(Out);


plot(t,y)

[sumaiya hossain]

The code keeps on saying 'syms' requires Symbolic Math Toolbox.

Error in func_t (line 2)

syms t

Just to clarify this is how you code for the function to be calculated?

[Torsten]

The code keeps on saying 'syms' requires Symbolic Math Toolbox.

And do you have the license ?

What do you get when you enter

[status,errmsg] = license('checkout','Symbolic_Math_Toolbox')

Answer 1

[Steven Lord]

You don't need the line of code where you define t as a symbolic variable, since on the next line you throw that symbolic variable away and assign a numeric vector to that identifier.

t =  -3:0.1:10;

I believe you will need to make one change to your function. You need to use element-wise division (./) instead of matrix division (/) in the second term if you want to divide each element of exp(-t) by the corresponding element of t.

y = 4*sin(2*pi*t) + exp(-t)./t;
plot(t,y)

Note that your function is undefined at t = 0.