matlab code for Euler's method

I have written this code for my class, but keep getting 'index exceeds matrix dimensions' can anyone tell me what's wrong with it?

%%Problem 1.9

%Use Euler's method to solve for the depth of a tank

A = 1250; %area in m^2

Q = 450; %m^3/d

h = .5; %step size

t = 0:h:10; % time in d

dydt = @(t) 3.*Q./A.*sin(t).^2-Q./A

y(1) = 0;

for k=1:length(t)-1

      y(k+1) = y(k)+dydt(v(k))*h

end

[t' y']

I greatly appreciate the help.

Answer 1

[Walter Roberson]

What is v ?

[Mary Jeppson]

Thanks.. That was the problem.