Multiplying a matrix by a function

How can I multiply a matrix by a function of time so that my answer is a time dependent function?

For example: say u(t)=P*n(t)

n(t) is a function of time and P is a 5x5 matrix. I am trying to put this in matlab so that I can graph u(t) vs time.

[James Tursa]

What is n(t)? Is it a vectorized m-file function? A vectorized function handle? Does it return a 5xN matrix? Or ...?

[Denikka Brent]

n(t) is a function dependent on time. When solved in matlab it shows to be a vector of columns 1-100

[James Tursa]

Is the first dimension of the n(t) result 5? If not, how are you supposed to multiply it by P?

Answer 1

[possibility]

I am assuming P to be 5 X 5 matrix and n(t) to be 5x100. Hence, if you do the calculation

u(t) = P*n(t) , you are going to get u(t), a 5x100 matrix (same dimension of n(t)).

You can do it in a for loop

for i=1:size(n,1)
u(i,:)=P(:,i).*n(i,:)
end