Not enough input arguments

Hi, I'm really confused with the error on my code.. can someone help me point out which part of this did I mistype or something? What exactly does "not enough input arguments" mean? SOS T_T

%problem: f(x)= (3cosx-sinx)e^-0.2x for -4<=x<=9

clc;
x = [-4:1:9];
y = (3*cos(x)-sin(x))*(exp.^-0.2*x);

plot(x,y,'Linewidth',2), xlabel('x ->'), ylabel('y ->'), title('plot for -4 <= x <= 9');
grid

there's an error message that says:

[Mujtaba Farrukh]

Use this code:

clc;

x = -4:9;

y = (3*cos(x)-sin(x)).*(exp(-0.2*x));

plot(x,y,'-or','Linewidth',2), xlabel('x ->'), ylabel('y ->'), title('plot for -4 <= x <= 9');

grid minor

axis tight

[Zzahng Cal]

thank you!

Answer 1

[MJFcoNaN]

"exp" is a function, not a number. I guess this is what you need:

y = (3*cos(x)-sin(x)).*exp(-0.2*x);

[Zzahng Cal]

exactly that! thank you!