University:
Massachusetts Institute of Technology
Course:
6.01SC | Introduction to Electrical Engineering and Computer Science I
Academic year:

2020
Views:

253

Pages:

1
Author:

Gunner Petersen

Problem Wk.4.1.5: PolyR on Signals Read the handout for the software lab. Implement the polyR procedure. You can assume the following methods are in the Signal class: class Signal: def __add__(self, other): return SummedSignal(self, other) def __rmul__(self,other): return ScaledSignal(self, other) And so, you can add Signal instances and scale them by a constant using arithmetic operations: s1 s2 s3 s4 = = = = CosineSignal(0.1) CosineSignal(0.3) s1 + s2 2 * s3 Note that the number must be the first argument of the multiply. You can also use Rn(signal, k); it is already defined for you. Be careful when using the + operator on Signals; it will only work on two Signals. For example, you cannot do: result = 0 result += CosineSignal(0.1) If you want to use the Python sum operator, then you have to be careful about specifying the start value; see the Python documnetation for sum. The first argument to polyR is a signal and the second is an instance of the Polynomial class. You can get a list of the coefficients from the coeffs attribute of a Polynomial instance. You can create new instances via poly.Polynomial(c) where c is a list of coefficients. You are welcome to use recursion in your procedure.