1. The problem statement, all variables and given/known data I am suppose to write a program that compares the FFT (Fast Fourier Transform Diagrams) of a sampled signal without the use of a window function and with it. The window function should be as long as the signal and the signal should have N points, N chosen as to not cause leakage of the specter of the signal. **The window function should be such that it's components diminish from 0 to it's end. 2. Relevant equations 3. The attempt at a solution I am having troubles applying the window functions because i get some weird output signal from a pretty simple line of code so i'm sure i'm not getting how this is suppose to work in MATLAB. Let's say I am trying to use the triangle window function because im not sure what is meant by the ** condition in the assignment. Maybe that the triangle function should be symmetric on the y axis? Code (Matlab M): f1 = 1000; f2 = 1270; fs = 15000; F1 = 100/1500; %minimum N so i wouldnt have signal leaks on the frequency diagrams. F2 = 127/1500; N = 1500; n = 0:N-1; x = 8*cos(2*pi*F1*n)+5*cos(2*pi*F2*n); % i have found that the triangle window function is called with triang(L) window = triang(N); %length should be N as the signal is of length N xwindowed=x.*window; figure stem(n, x); pause figure stem(n, xwindowed); pause The original signal outputs like this: and the windowed like this: which makes no sense and is not how this is suppose to work. What don't i understand here?