Lecture 5 - Programmig

8/12/2019 Lecture 5 - Programmig

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EngineeringEducation

EngE 1114, Spring 2014

Exploration of Engineering DesignEngE 1114

Graphics Communication Hand Sketching Computer Aided

Design/DraftingINVENTOR)

Design Teamwork Project Management Design Process Algorithm Development

Flowcharting Programming in MATLAB

Start

MATLAB


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INVENTORTEST: Thursday Feb 27th 7PMLocations TBARequires your tablet fully chargedClosed book notes internet: just you and InventorYou will be given a properly dimensioned

engineering drawing (multi-view) with a pictorial.

You will then create the object in Inventor andSUBMIT that ipt file via a Scholar link. The test

should take 60 minutes, but you will be given 45

90.


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Programming module topicsAlgorithm Development

Flowcharting

Sequential programming with MATLAB 2013bTimeline

Feb 21-27 Intro Algorithm development

Flowcharting basics

MATLAB basics and script files

Feb 28- Mar 6 Decision structures

Logical and relational operators

March 720 Spring break

Repetition structures

Summing and averaging Ensuring valid input

March 21-27 User defined functions

March 28April 3 Vectors

LECTURE

INVENTOR Test Feb 27th

MidTerm Test March 27th

MATLAB Test April 3rd


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Why should engineers know how to write acomputer program?


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Rationale for Learning AlgorithmDevelopment Programming

Computers are routinely used in all

fields of engineering to help solve

problems.

Upper level courses in most departmentswill require the use of a computer to generate

results (answers) for some problems.

Programming can be a important tool in design,

especially in the preliminary and detail design phases.

Developing an algorithm is a good problem solving

technique. Algorithms are independent of specific

input values.

Graphics Communication Hand Sketching Inventor

Design Teamwork Project Management Design Process

Algorithm Development Flowcharting Programming in

MATLAB


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Algorithm? What is it?


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Algorithm: an effective procedure,

a way of getting somethingdone in a finite number ofdiscrete steps.*

* The Advent of the Algorithm, David Berlinski,

Harcourt, Inc., New York, 2000, pg xvi.

We will write algorithms as a way to provide

step by step instructions for solving a problem.

A precursor to writing programming code for acomputer


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Example MATLAB program via target1:Examines the trajectory of a pingpong ball into a trash canWhat must be considered? List parameters

LECTURE


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Required elements:1. Problem ID

2. Brief statement of what algorithm will do in your own words

3. A diagram for the problem, when appropriate a sketch is fine

4. Flowchart (copy and paste from VISIO)5. Program listing (copy and paste from MATLAB)

6. Sample Output (copy and paste from MATLAB)

7. Discussion You are expected to check the output from your program

to see that it makes sense. Acknowledge anyunexpected results.

Acknowledge any error messages

Homework format:

LECTURE


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In-class problem: Produce an algorithm that will determine the volume

and surface area of a sphere given the diameter.

Sketchthe flowchart on your PPT panel.


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Sphere Vol and SA flowchart.try Visio


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Engineering

Education

Sphere Vol and SA flowchart.try MATLAB

But first.


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Engineering

Education

Some MATLAB basics:

Command Line commands: Assignments Variable names Case sensitivity Semicolon up-and-down arrows Pi + - / * ^ Algebraic hierarchy Sequential programming

i.e. one line at a time Screen areas Path clc Clear Script files


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Engineering

Education

Script Files File Names Input statements

Vname=input literal string); Inputs are assignment Output statements

fprintf Literal strings Format specifiers

f M.Nf

M is number of columns N is digits to right of decimal

These signs are NOT comments General form of fprintf is:fprintfliteral string info, vname1, v2, x3) The literal string includes text and formatspecifiers.


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Engineering

Education

Review student code:

Add the following two lines to the end of your program:load handel

sound(y,Fs)

Then.. Turn on your speakers

type file name at command prompt OR

select debug and run from editor

Enter a diameterGo.

halleluiah

ndl n n n n n p.

l l.
http://www.google.com/imgres?imgurl=http://www.hallelujah-chorus.com/images/handel.jpg&imgrefurl=http://www.hallelujah-chorus.com/georg-handel.html&h=434&w=346&sz=7&tbnid=xpW5pW70gZyRWM::&tbnh=126&tbnw=100&prev=/images?q%3Dhandel%2Bpix&usg=__xtuWKKTMtHf6v3mnCsl2Fdy49JI=&ei=ctjDSfiODZeMtgeZ-tnICg&sa=X&oi=image_result&resnum=1&ct=image&cd=1http://www.google.com/imgres?imgurl=http://www.hallelujah-chorus.com/images/handel.jpg&imgrefurl=http://www.hallelujah-chorus.com/georg-handel.html&h=434&w=346&sz=7&tbnid=xpW5pW70gZyRWM::&tbnh=126&tbnw=100&prev=/images?q%3Dhandel%2Bpix&usg=__xtuWKKTMtHf6v3mnCsl2Fdy49JI=&ei=ctjDSfiODZeMtgeZ-tnICg&sa=X&oi=image_result&resnum=1&ct=image&cd=1http://www.google.com/imgres?imgurl=http://www.hallelujah-chorus.com/images/handel.jpg&imgrefurl=http://www.hallelujah-chorus.com/georg-handel.html&h=434&w=346&sz=7&tbnid=xpW5pW70gZyRWM::&tbnh=126&tbnw=100&prev=/images?q%3Dhandel%2Bpix&usg=__xtuWKKTMtHf6v3mnCsl2Fdy49JI=&ei=ctjDSfiODZeMtgeZ-tnICg&sa=X&oi=image_result&resnum=1&ct=image&cd=1


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Engineering

Education

Listen to the voiceover files associated with your homework. They represent

your free textbook for MATLAB and flowcharting.

Other resources are available via the bookstore or Newman Library.

Other notes:

Questions about homework, workshops and grades should be first

addressed to your workshop leader (or any of the workshop leaders)

When emailing me or your WSL you must include your name, the course

and section, and a subject. Be patient, ENGE1114 has 740+ students in

addition to other classes and responsibilities.


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Programming: Quiz#7456:

1. The flowchart symbol for a

process is:

A. RectangleB. Parallelogram

C. Ellipse

D. Triangle

2. The flowchart symbol for a

repetition structure is:

A. RectangleB. Parallelogram

C. Irregular hexagon

D. Diamond

3. The flowchart symbol for input or

output is:

A. DiamondB. Parallelogram

C. Rectangle

D. Ellipse

4. The fprintf command is used to:

A. Save values

B. Print the current page

C. Print highlighted entities

D. Send output to a printer/device

5. The % symbol at the end of a linemeans:

A. What follows is a comment

B. the line should be ignored

C. Store values from line

D. Output values to the printer

6. Which of the following is/are invalidvariable name(s):

A. Diamond

B. Flow-chart

C. nOnAme

D. maroONANdorange

E. 12Times

F. Items B and E are invalid names

7. Which of the following format specifiers

will display the value of pi as 3.1416

A. %f B. %0.f

C. %1.5f D. %7.4f

E. %%1.4f F. f5.5%

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Lecture 5 - Programmig