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Not enough input arguments

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Zzahng Cal
Zzahng Cal 2022-4-6
评论： Zzahng Cal 2022-4-9
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:
  2 个评论
Mujtaba Farrukh
Mujtaba Farrukh 2022-4-6
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

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采纳的回答

MJFcoNaN
MJFcoNaN 2022-4-6
"exp" is a function, not a number. I guess this is what you need:
y = (3*cos(x)-sin(x)).*exp(-0.2*x);

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