general computer science for engineers cisc 106 lecture 01 james atlas computer and information...
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General Computer General Computer Science Science
for Engineersfor EngineersCISC 106CISC 106
Lecture 01Lecture 01
James AtlasComputer and Information Sciences
9/2/2009
Course OverviewWebsite:
◦http://www.udel.edu/CIS/jatlas/106/09F/
Lab based course◦MATLAB◦TA for each lab
LabsPair programmingLabs assigned on MondayLabs always due on the following
Thursday at 11:55PM (10 days from assignment)
Projects are group work and will be due 3 weeks after assigned
GradingLabs (25%)Participation (5%)Two Projects (10% + 10%)Two Midterm Exams (15% + 15%)Final Exam (20%)
Your final course grade cannot be more than one letter grade higher than your exam average
Course HelpOffice Hours
◦Tues 1-3PM Thurs 2-4PM◦TA: TBD
Sakai◦Forums are great!
Intro to Computer ScienceExercise:Compute based PictionaryYour team must create a list of
instructions to draw a picture◦ Choose a simple object to draw◦ Numbers are allowed◦ All prepositions, adjectives are allowed
on, next to, across
◦ Nouns can only be geometric nouns: Circle Line Square
◦ No “car” or object nouns
MATLABCommand lineInteractive (interpreted)matlab
◦GUI versionmatlab -nodesktop
◦Text version
MATLABPrompt
◦>>Expression
◦>> 2 * 2Variable
◦>> product = 2 * 2
MATLABHow can we calculate the area of
a circle?
>> pi * 3^2
>> radius = 3>> pi * radius ^ 2
fx f(x)
fradius area
FunctionsFunctionsTop-down program design (pp.
87-90)Breaking problems downCode reuse (Don’t reinvent the
wheel)
How do we write functions in MATLAB?
MATLAB m-filesMATLAB m-filesCreate a circleArea m-file
Sample function circleArea.mSample function circleArea.m
%circleArea = number -> number%takes the radius of a circle and
returns the calculated area of a circlefunction outputValue =
circleArea(radius) outputValue = pi * radius ^ 2;
Now, what if we want to Now, what if we want to calculate area of a ringcalculate area of a ringA ring of two concentric circles
= -
Area of a ringArea of a ringpi * (radius1)^2 – pi *
(radius2)^2
Test area of a ringTest area of a ringringArea(2,1)ringArea(3,1)Etc.