how to plot this ?

syms x;
y=exp(-x).*sin(x);
plot(x,y);

hey, i want to plot this but for reaon I can't.. I didn't find any answer in previous questions.

can someone tell me where I am wrong ?

Answer 1

[Stephan]

syms x;
y=exp(-x).*sin(x);
fplot(x,y);

[Tomer Segev]

why are you using the fplot ?

[Stephan]

fplot plots expressions or functions - this is what you have done here. To use plot, you would need to have vectors containing values to plot. For example:

fun = @(x) exp(-x).*sin(x);
fplot(fun)

works - but

fun = @(x) exp(-x).*sin(x);
plot(y)

gives an error. If you calculate values from the function, it will work using plot:

fun = @(x) exp(-x).*sin(x);
x = linspace(-5,5);
y = fun(x); 
plot(x,y)

This is the difference in both commands.

[Stephan]

BTW: Did you notice that you can accept and/or vote for useful answers?

[Tomer Segev]

OK, that's great! thank you!