How to plot two function multiplied by each other.

I am attepmting to plot the functions below. I recieve the error,

"Error using  * 
Incorrect dimensions for matrix multiplication.
Check that the number of columns in the first
matrix matches the number of rows in the second
matrix. To perform elementwise multiplication,
use '.*'.

And then when I try to add the dot between my products I still recieve the error. What is the problem?

a=0;
b=3;
N=10000;
h=(b-a)/N;
t=a:h:b;                                                                    

x=2000*sind(120*pi*t)*exp(-180*t)

plot(t,x)

[darova]

Please this carefully

Answer 1

[Srivardhan Gadila]

The output of sind(120*pi*t) & exp(-180*t) are vectors of size equal to size(t) = 1x10001.

Hence as the error indicates you to check the dimensions of matrix multiplication.

You have to use .* instead of * for element wise multiplication between two vectors having same shape.

x=2000*sind(120*pi*t).*exp(-180*t)

Refer to times, .*