Task 4 The following data represents the bacterial growth on a piece of chicken left out on the kitchen bench by your room-mate. t (minutes) b (bacteria) 0 100 5 200 a) Plot the raw data as a continuous line. 10 450 15 950 20 2000 25 5000

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Task 4
The following data represents the bacterial growth on a piece of chicken left out on the
kitchen bench by your room-mate.
t (minutes)
b (bacteria)
0
100
5
200
a) Plot the raw data as a continuous line.
10
450
15
950
20
2000
25
5000
b) Fit an exponential model to the bacteria data above. You may use polyfit once you've
linearised the data.
c) Using the exponential model, extrapolate the value of bacteria at t=30 minutes. Use a blue
circular marker to represent the bacteria at t=30 on the same figure and print the value
in the command window.
d) Instead of cleaning up the chicken mess your friend left, he/she wants to see how a
polynomial fit to the data instead. You may use polyfit for this. Your m-file should be
interactive such that it asks the user for the degree of the polynomial to fit. Your m-
file should plot the data of the fitted polynomial interpolated over 60 points with polyval
from t=0 to t=30 in a new figure window. Print to the value of bacteria at t=30 to the
command window. Print out the polynomial degree in the title of the plot.
Transcribed Image Text:Task 4 The following data represents the bacterial growth on a piece of chicken left out on the kitchen bench by your room-mate. t (minutes) b (bacteria) 0 100 5 200 a) Plot the raw data as a continuous line. 10 450 15 950 20 2000 25 5000 b) Fit an exponential model to the bacteria data above. You may use polyfit once you've linearised the data. c) Using the exponential model, extrapolate the value of bacteria at t=30 minutes. Use a blue circular marker to represent the bacteria at t=30 on the same figure and print the value in the command window. d) Instead of cleaning up the chicken mess your friend left, he/she wants to see how a polynomial fit to the data instead. You may use polyfit for this. Your m-file should be interactive such that it asks the user for the degree of the polynomial to fit. Your m- file should plot the data of the fitted polynomial interpolated over 60 points with polyval from t=0 to t=30 in a new figure window. Print to the value of bacteria at t=30 to the command window. Print out the polynomial degree in the title of the plot.
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