Basics of MATLAB and Beyond

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are the same size and aligned at the same x position. If you edit thisproperty, all of the selected items will be affected.Guide can be used for any matlab Figure, not just one that hasuicontrols or uimenus. For example, you can use guide to move arounda set of axes on a figure.34.9 Other AidsA suite of tools to help you program GUIs can be found in the uitoolssubdirectory. Type help uitools to get a list of these tools and a shortsummary of what they do. For example, the btngroup function canbe used to automatically create a group of buttons in which only onebutton is allowed to be down at a time. Another possibility is a “flash”button that presses in and immediately pops back out again. Buttonappearance can also be customised using the btngroup function.When building a GUI, prototypes can be saved using print -dmfile.Elements in your GUIthat you have produced from the command windowwill then be saved in the m-file.For further information on GUIs, see the manual Building GUIs withMATLAB.35 Printing GraphicsWhen you type print at the matlab prompt, the current figure isprinted on your default printer. The plot is printed so that the aspectratio matches that seen on the screen for the default settings, and it isplaced centrally on the page oriented like a portrait: the long dimensionof the page upright:plot(humps)printIf your matlab has been installed properly, you should find the plotcentred for the paper size you are using. If it is not, put the followingstatement into your startup.m file:set(0,’DefaultFigurePaperType’,’a4letter’)or substitute your correct paper size (see below for a list of options).There are many ways you can control how a graphic is printed. Thefollowing is a list of figure properties that have to do with printing andtheir options:c○ 2000 by CRC Press LLC
InvertHardcopy: [ {on} | off ]PaperUnits: [ {inches} | centimeters| normalized | points ]PaperOrientation: [ {portrait} | landscape ]PaperPositionPaperPositionMode: [ auto | {manual} ]PaperType: [ {usletter} | uslegal | a3| a4letter| a5 | b4 | tabloid ]We won’t look at these in detail to start with; instead we’ll look at aneasy way to change these properties to get commonly wanted effects.35.1 Print Size: OrientThe orient command is an easy way of setting the various figure propertiesto get rudimentary control of printed output. There are three kindsof orientation, each illustrated below.Tallplot(humps)orient tallprintThe tall orientation can be used when you have plots stacked on topof each other:for i = 1:40,subplot(10,4,i),endorient tallprintLandscapeplot(humps)orient landscapeprintPortraitThe default orientation is “portrait”, which can be restored using:plot(humps)orient portraitprintc○ 2000 by CRC Press LLC
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BASICS OFMATLAB®and Beyondc○ 200
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Library of Congress Cataloging-in-P
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typing pwd (print working directory
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ContentsIBasics of MATLAB1 First St
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20 Time-Frequency Analysis21 Line A
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39Answers to Exercises (Part I)40 A
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Set → Getting Started with MATLAB
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1.5 The Colon OperatorTo generate a
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matlab will recall the last command
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a = zeros(2,3)a =0 0 00 0 0>> b = o
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[a a(a)]ans =1 2 3 1 4 74 5 6 2 5 8
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a + bans =11 3344 6677 993.8 Transp
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4.2 Adding PlotsWhen you issue a pl
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x = [[1 2 3 4]’ [2 3 4 5]’ [3 4
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4.7 AxesSo far we have allowed matl
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v =1122>> v*uans =1 2 0 11 2 0 12 4
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max returns a vector containing the
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s = 100*spiral(3)s =700 800 900600
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We can plot the surface z as a func
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The contour function plots the cont
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m = gray(8);colormap(m)imagesc(1:10
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hold onplot3(x(ind),y(ind),z(ind),
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z = 5*ones(3,3)z =5 5 55 5 55 5 5>>
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contour(x,y,z,30);You may have noti
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variables that are local to themsel
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SwitchThe basic form of a switch st
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i =i =123136Vectorised Codematlab i
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9.1 MATLAB FormatTo save all the va
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11 StartupEach time you start matla
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Where p i is the population for yea
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NaNs by leaving them off the plot.
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clfpolar(t,gdb)In this case you mus
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-0.5000-0.3750-0.2500-0.125000.1250
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the periodograms of the blocks, and
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plot(y(1:1000))axis([0 1000 -5 5])z
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comet(x,y)(You can get a three-dime
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By clicking within the panner box a
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x = linspace(-1,1,8192);Fs = 1000;y
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23.3 Graphical Object Hierarchymatl
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Now we need to get the handles of a
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Beyond the BasicsPreludeThis part o
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clfgplot(A,[x y])axis off(Try zoomi
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str =you’re the one>> str = ’
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strrep(str,’go’,’am’)ans =I
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ans =3.14159e+100Some additional te
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eval(str)v =1 2 3 4 5The eval(str)
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Inline objects, like every other ma
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a(1,1) = {[1 2 3]}a =[1x3double]or>
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t = {’help’ spiral(3) ; eye(2)
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meteo.Temperatureans =24ans =19.000
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3 >> a = [1 2 ;4 5 6;7 8 9]a =1 2 3
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[x,y] = meshgrid(1:5,1:3)x =1 2 3 4
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ans(:,:,2) =999And to sum over “p
Page 109 and 110: An Application of RGB ImagesTo see
Page 111 and 112: You can see that over the 8 time st
Page 113 and 114: name>> staff(2,1,2).name(5:9)ans =B
Page 115 and 116: q =7 8 96 1 25 4 3>> save saved_dat
Page 117 and 118: fid = fopen(’asc.dat’);The fope
Page 119 and 120: display and the enclosed area is th
Page 121 and 122: MarkerEdgeColor = auto(and so on)In
Page 123 and 124: text(-.7,f(-.7),’f(X)’)But we h
Page 125 and 126: plt(x,f(x/2),’--’)Let us try ca
Page 127 and 128: Example: findobjThe findobj command
Page 129 and 130: 3. Add the property you want to set
Page 131 and 132: is numbered from top to bottom. The
Page 133 and 134: axis ijUsually images like this do
Page 135 and 136: 32.2 Tick Marks and Labelsmatlab’
Page 137 and 138: clfaxes(’pos’,[.2 .1 .7 .4])x =
Page 139 and 140: property to [0 top] in the call to
Page 141 and 142: object’s HorizontalAlignment and
Page 143 and 144: the required symbols. The m-file ti
Page 145 and 146: 1. Use graphical elements that serv
Page 147 and 148: uicontrol(’Callback’,’ezplot(
Page 149 and 150: uicontrol(’Pos’,[110 280 60 19]
Page 151 and 152: ’String’,’0.5’,’Style’,
Page 153 and 154: function exradio(action)if nargin =
Page 155 and 156: fail. One place to put variables th
Page 157 and 158: 34.7 Fast DrawingFor fast drawing o
Page 159: controlled by guide and which are a
Page 163 and 164: Another option is to use an image f
Page 165 and 166: yur is the y coordinate of the uppe
Page 167 and 168: \end{center}\caption{This is the fi
Page 169 and 170: x 294x1 ...y 294x1 ...z 294x1 ...Gr
Page 171 and 172: diagram. Such a triangular grid can
Page 173 and 174: xt = x([1 9 10 1]);yt = y([1 9 10 1
Page 175 and 176: x = [0 0 .5 0.5 .5 1 11 .5 .5 .5];y
Page 177 and 178: fac2 = [1 2 61 6 31 4 61 6 5];The r
Page 179 and 180: t = linspace(0,2*pi,20);x = cos(t);
Page 181 and 182: N = 20;dt = 2*pi/N;t = 0:dt:(N-1)*d
Page 183 and 184: colouring of the sphere itself. To
Page 185 and 186: material dullThe default is materia
Page 187 and 188: time taken by this routine to calcu
Page 189 and 190: first row of a by taking the column
Page 191 and 192: 38.3 Debuggingmatlab has a suite of
Page 193 and 194: 10: y = linspace(ycentre - L,ycentr
Page 195 and 196: We change variables:p ′ = C + Bx.
Page 197 and 198: Exercise 6 (Page 59)You can generat
Page 199 and 200: 33 ! 36 $ 39 ’ 42 * 45 - 48 034 "
Page 201 and 202: R = 1; N = 200;[x,y] = meshgrid(lin
Page 203 and 204: (The plot might take a few seconds
Page 205: % Reproduce the layers at the diffe
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