Introduction to MatlabIntroduction to Matlab

Akiko Sekikawa

MATrix LABoratoryMATrix LABoratoryA numerical computing environment that allows;p g ;

matrix manipulations, plotting of functions and data, implementation of algorithms, creation of user interfaces

Where to buy?http://www.mathworks.com/Download software packageDownload software packageOr order DVD

ContentsContents� System requirement and installation� System requirement and installation

� How to load a tab-delimited file (readtext, dlmread)

� How to make a histogram (hist)

� How to make a scatterplot (plot)p (p )

System Requirement- release 2010b operating systems

Windows Mac Linux

Wi d XP S i P k 3 M OS X 10 5 8 (L d) S t dWindows XP Service Pack 3

Windows XP x64 Edition Service Pack 2

Mac OS X 10.5.8 (Leopard) and above

Mac OS X 10.6.x (Snow

Supported distributions

Ubuntu 9.10 and

Windows Server 2003 R2 Service Pack 2

(Leopard) 10.04 LTS

Red Hat Enterprise Linux 5 x and 6 x

Windows Vista Service Pack 1 or 2

Linux 5.x and 6.x

SUSE Linux Enterprise

Windows Server 2008 Service Pack 2 or R2

Windows 7

pDesktop 11.x

Debian 5.xWindows 7

System Requirement- release 2010b

Processors Disk Space RAMAny Intel or AMD x86 processor supporting

1 GB for MATLAB only,3–4 GB for a

1024 MB(At least 2048 MB

SSE2 instruction set(Windows&Linux)

typical installation recommended)

All Intel-based Macs with an Intel Core 2 or later(Mac)

Installation 1Installation 1

After Insertion of the DVD into the DVD drive or downloading the product files from the MathWorks website;

Windows Systems —The installer should start automatically. y y

Linux Systems — For DVD, execute the following command:/path_to_dvd/install &For downloaded files, extract the installer from the archive file and execute the installer command:./install

Macintosh Systems —When the DVD icon appears on the desktop, double-

Installation 2Installation 2Chose if you install using Internety g

Installation 3Installation 3Software License Agreementg

Installation 4Installation 4Log In to Your MathWorks Accountg

Installation 5Installation 5Select the License You Want to Install

Installation 6Installation 6Choose the installation typeyp

Installation 7Installation 7Specify the Installation Folderp y

Installation 8Installation 8Specify Products to Install (Custom Only)p y ( y)

Installation 9Installation 9Complete the Installationp

Getting startedGetting started…

ContentsContentsSystem requirement and installationy q

� How to load a tab-delimited file (readtext, dlmread)dlmread)

� How to make a histogram (hist)

� How to make a scatterplot (plot)

File OperationsFile OperationsWorks in the similar way as Unix systemy y

change directorycdcd

list segments List the folder contents- List the folder contents

ls

How to load atab delimited filestab-delimited files

textread or dlmreadFile with tab-delimited numbers will be read as vectorX = textread(’filename') or X= dlmread(’filename')

ContentsContentsSystem requirement and installationy q

How to load a tab-delimited file (readtext, dlmread)

� How to make a histogram (hist)

� How to make a scatterplot (plot)p (p )

HistogramHistogramFunction: hist

n = hist(Y) bins the elements in vector Y into 10 equally spaced containers.

Histogramti- options

n = hist(Y, nbins)( , )where nbins is a scalar, uses nbins number of bins.Hist(Y, 100) gives;

Histogramti- options

n = hist(Y,x) where x is vector( , )returns the distribution of Y among length(x) bins with centers specified by x.hi t( b) h b 10 0 1 10 ( t f 10 10 1 9 9hist(a, b) where b = -10:0.1:10 (vector of -10, -10.1,…,9.9, 10) gives;

ContentsContentsSystem requirement and installationy q

How to load a tab-delimited file (readtext, dlmread)

How to make a histogram (hist)

� How to make a scatterplot (plot)p (p )

ScatterplotScatterplotFunction: plot (default gives simple line chart)p ( g p )

plot(Y) plots the columns of Y versus the index of each value when Y is a real number.

Scatterplotti- options

Instead of using index, you can have one more vector g , ywith same length to set it as value of another axis.

Scatterplotti- options

Format of data points can also be changedp gplot(X1,Y1,…Xn, Yn, LineSpec)

SummarySummarySystem requirement and installationy q

How to load a tab-delimited file (readtext, dlmread)

How to make a histogram (hist)

How to make a scatterplot (plot)

If you are stuck with usage of functionsIf you are stuck with usage of functions…help function name