The code is correct, however I keep getting this error: Invalid color, marker, or line style.

% Parameters

f = 10; % Frequency in Hz

a = 1;

fs = 100; % Sampling rate in Hz

fst = 1; % Sampling time in seconds

ts = 1/100;

% Time axis

time = 0:ts:1;

% Complex sine wave

s = a* exp(j *2 * pi* f* t);

% Real and imaginary parts

real_s = real(s);

imag_s = imag(s);

% Plot

figure;

plot(t, real_s, 'r.*', t, imag_s, 'b-*');

xlabel('Time (s)');

ylabel('Amplitude');

title('10 Hz Signal Time-Domain Graph');

[louis]

I'm able to use other markers but not '.*' or '-*'.

[Fangjun Jiang]

plot(1:10,'-*')

plot(1:10,'.*')

Error using plot
Invalid color, marker, or line style.

[Stephen23]

"The code is correct"

It is not correct to specify two markers:

https://www.mathworks.com/help/matlab/creating_plots/specify-line-and-marker-appearance-in-plots.html

[louis]

Two marks isn't correct. Got it, thank you.

Answer 1

[Fangjun Jiang]

See the possible marker symbol and line symbol

help plot

Various line types, plot symbols and colors may be obtained with
PLOT(X,Y,S) where S is a character string made from one element
from any or all the following 3 columns:

b     blue          .     point              -     solid
g     green         o     circle             :     dotted
r     red           x     x-mark             -.    dashdot 
c     cyan          +     plus               --    dashed   
m     magenta       *     star             (none)  no line
y     yellow        s     square
k     black         d     diamond
w     white         v     triangle (down)
^     triangle (up)
<     triangle (left)
>     triangle (right)
p     pentagram
h     hexagram

For example, PLOT(X,Y,'c+:') plots a cyan dotted line with a plus 
at each data point; PLOT(X,Y,'bd') plots blue diamond at each data 
point but does not draw any line.

[louis]

Thank U.