EECS 246: PROBLEM SET #1 POST-MORTEM
Prof. Michael S. Branicky
Total = 50 points
Distribution was as follows (N=39):
5: 012
4: 00222222222255556777788888
3: 1356999
2: 69
1: 7
Problem 1.1 [10 points]
- Many people had domain = [1,300] which is not the same as {1, 2, ..., 300}.
Minus 1 point.
-
- Up to three points were awarded for correct rule here. +1 for a good try.
The thing that made it harder than the square wave is that the signal's
amplitude either depends on n or uses the floor function.
One student, Scott McMichael, gave the following Matlab code, which
I tested for correctness: x=1-20*abs(t-.2*floor(t/.2)-.1)
Problem 1.2 [10 points]
Error in one domain or range -1. Missing -3.
Many made same mistake as in Problem 1.1(a) for coin flips
and for color values:
[1,100] and [0,255] instead of {1,2,...,100} and {0,1,...,255}. Also,
range for coin flips is {H,T} not [H,T].
Problem 1.3 [10 points]
Many people either did not label signals at all (-4) or mixed them
in with the systems blocks (-2 or -3). Diagrams should conform to
the following template:
Signal in _________ Signal out
------------>| System |------------>
----------
Problem 1.4 [10 points]
Most did this correctly. Small errors were starting bumper at
0 (-1) or wrong domain for discrete signal (-1).
Problem 1.5 [10 points]
-2 for each plot missing.
Biggest problem was missing both outputs (-4).
Created: 2004-08-30.
Last Modified: 2004-08-31.