i can't plot this function in matlab

Hi all I'm new to Matlab so some help would be greatly appreciated.

Given the function f(t)=j/2* (exp(-j*2*pi*t)-exp(j*2*pi*t))

I have this code below to plot the function but for some reason I'm getting a straight line. not sure where my error is.

t=-1:0.01:1;

a=1j*0.5;

theta=1j*2*pi*t;

f=a.*(exp(-(theta))-exp(theta));

plot(real(f),imag(f));

axis equal, grid on;

Answer 1

[KSSV]

You see, your f is not a complex number. As you are plotting it as complex, you are getting a striaght line.

t=-1:0.01:1;
a=1j*0.5;
theta=1j*2*pi*t;
f=a.*(exp(-(theta))-exp(theta));
plot(f);
% axis equal
grid on;

Answer 2

[Star Strider]

The code is correct except for the plot arguments. In the plot, it is necessary to plot the real and imaginary parts aginst ‘t’ instead of each other.

t=-1:0.01:1;
a=1j*0.5;
theta=1j*2*pi*t;
f=a.*(exp(-(theta))-exp(theta));
plot(t,real(f),  t,imag(f));
axis equal, grid on

.