can help check this ? i cant run this all command keep error

syms t w

% The expressions with variables t and w will be treated as symbolic expressions.

» x = str2sym('exp(-2*t)*Heaviside(t)')

% symbolically defines signal x, and the result is

x=

exp(-2*t)*heaviside(t)

» X = fourier(x)

% X is the symbolic Fourier transform (expressed in w) of x, and

the result is

x=

1/(2+w*li)

>>syms f

>>Xf=subs(X,w,2*pi*f)

Xf=

1/(pi*f^2i+2)

>>Xf_conj =subs(Xf,i,-i)

-1/(pi*f*2i-2)

» Gf = Xf*Xf_conj

Gf=

-1/((pi*f*2i-2)*(pi*f*2i+2))

» simplify(Gf)

ans =

1/(4*pi^2*f^2+4)

% Simplifying expression

% The following commands are related to plotting command

» subplot(2,1,1)

» ezplot(x,[-0.1,2.5])

» subplot(2,1,2)

» ezplot(Gf,-2,2)

Answer 1

[Shadaab Siddiqie]

From my understanding you are getting an error while running the above commands. From what I see you can use "heaviside" instead of "Heaviside" since function name is case sensitive.

x = str2sym('exp(-2*t)*heaviside(t)')

Also to plot multiple images refer here.