Why am I not getting an array of answers from this operation?

t=linspace(0,3.5,1000);
u=4*exp^(-0.45*t.)*sin(4*t. + 0.5);

I want u to be an array that is the same size as t, but whenever i try to run this matlab says I have a parse error at ')' referring to the first closing parenthesis. I also tried making u an anonymous function of t but I could not get that to work either.

Answer 1

[Star Strider]

Because you coded it with incorrect syntax.

Try this:

t=linspace(0,3.5,1000);
u=4*exp(-0.45*t).*sin(4*t + 0.5);

figure
plot(t, u)
grid

Note the element-wise multiplication (using .* rather than *), and other improvements.

[Stephen23]

Read more here:

https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

Learning the difference is critical to using MATLAB.