error because "pkg load symbolic"

I try to run this code that my teacher gave me, but I can't because it shows an error on line 2

close all; clear all; clc;

pkg load symbolic

syms w t

A=25;

T=3.5;

f1 = A*(heaviside(t)-heaviside(t-T/3));

f2=(2*A/3)*(heaviside(t-T/3)-heaviside(t-2*T/3));

f3=(A/3)*(heaviside(t-2*T/3)-heaviside(t-T));

f=f1+f2+f3;

% Octave Solution:

Fw(w)=fourier(f)

w0=42;

Fww0=round(eval(Fw(w0))*1000)/1000;

-----------------------------------

I get this error:

Unrecognized function or variable 'pkg'.

Error in www (line 2)

pkg load symbolic

Answer 1

[Walter Roberson]

That code is not MATLAB code; it is Octave code. For MATLAB comment out

pkg load symbolic

Note:

Fww0=round(eval(Fw(w0))*1000)/1000;

eval() of a symbolic expression tends to fail in MATLAB. Use double(subs(EXPRESSION)) instead of eval(EXPRESSION)

Answer 2

[Torsten]

In MATLAB, you don't need to load a package:

pkg load symbolic

This is an octave command.

In MATLAB, either you have a licence for the symbolic toolbox or not. In the first case, your code will run, else not.