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Matlab Introduction slgu@yzu.edu.cn 87979358(o), 87328797(h)

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1.1 Matlab 1. 2. 3. 4. 1

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1. Matrix Laboratory (1967) Mathworks 1984 Matlab 2. Matlab 3.0~7.4 ; r2007b 2008b. 3. 1.2

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1.3 7.0 2007a b 500m

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2 2.1 2.1.1 command 2.1.2 M editor 2.1.3 workspace

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2.1.4 M 2.1.5 2.1.6 2.1.7 2.1.8

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2.2 1) x=[1 2 3 4]( ); 2) x=2:.5:20, x=a:i:b, x=a:b, x=[a:i:b]; 3) x=linspace(1,10,20), x=linspace(1,20); 4) x=rand(3,4), x=randn(m,n), x=random(name,a,b,c,m,n), x=Random(unid,k,m,n)

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5) [x,y]= meshgrid(-2:.1:2) 6) load filename load data.dat, data.txt, data.csv, load filename or load filename 7) xlsread filename, xlsread filename.xls; x=xlsread(filename); x=xlsread(filename,sheet2,c3:f7)

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8) Matlab imread -Read image from graphics file. p=imread(sxh.jpg), image(p) wavread -Read (WAV) sound file. Sd=wavread(music.wav), sound(Sd, 22500) aviread -Read movie (AVI) file. mv=Aviread(vip.avi), movie(mv, 2)

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2.3 max, min sum(x), mean(x) median, iqr, prctile(x, p) skewness, kurtosis sort prod std, std(x,1) var, var(x,1); cov corrcoef(x, y), corr(x)

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2.4 2.4.1 a+b, a-b a*b a^2 a\b, a/b

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2.4.2 a.*b a./b, a.\b, 1./a a.^2, a.^b

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2.4.3 C=sqrtm(A), B=expm(A), logm(A), C=funm(A, fun), fun=sqrtm,@sin 2.4.4 A==b, A>b, a