Science:Math Exam Resources/Courses/MATH307/April 2012/Question 06 (c)
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Question 06 (c) 

Now suppose a vector y contains measurements of the daily average temperature for 10 years. Explain how to use the Discrete Fourier Transform to produce a frequencyamplitude plot for this data. You should write the MATLAB/Octave commands you would use, and include the range of frequencies 0 to 0.1 day^{1} on your plot. 
Make sure you understand the problem fully: What is the question asking you to do? Are there specific conditions or constraints that you should take note of? How will you know if your answer is correct from your work only? Can you rephrase the question in your own words in a way that makes sense to you? 
If you are stuck, check the hint below. Consider it for a while. Does it give you a new idea on how to approach the problem? If so, try it! 
Hint 

Science:Math Exam Resources/Courses/MATH307/April 2012/Question 06 (c)/Hint 1 
Checking a solution serves two purposes: helping you if, after having used the hint, you still are stuck on the problem; or if you have solved the problem and would like to check your work.

Solution 

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Please rate my easiness! It's quick and helps everyone guide their studies. T = 3650 N = linspace(500,500,1000); Omega = N/T; amp = sqrt(22*cos(2*pi*T*(1omega)))./(2*pi*T*abs(1omega)); plot(Omega, amp); 