Hi I need some help with creating a function that takes a signal vector as input and computes the five-sample weighted moving average of the signal.

Here is a small example:

Your signal file consists of a vector y = [0.8, 0.9, 0.7, 0.6, 0.3, 0.4]. We can solve the smoothing problem by making use of a matrix: We first construct a matrix where each row is a shifted and scaled version of the signal, which means that in the first row, y is shifted left twice; in the second row y is shifted left once and multiplied by two; in the third row y is multiplied by three; etc. Summing each column and dividing by 9 yields the final result is: ˆy = [0.54444, 0.7, 0.68889, 0.56667, 0.4, 0.26667].