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1、T 分布 x=-5:0.02:5 k1=1 2 5 10 y1= y2= for i=1:length(k1) y1=y1,tpdf(x,k1(i) y2=y2,tcdf(x,k1(i) end plot(x,y1) figure; plot(x,y2)-5-4-3-2-101234500.050.10.150.20.250.30.350.4-5-4-3-2-101234500.10.20.30.40.50.60.70.80.91卡方分布： x=-eps:-0.02:-0.05,0:0.02:2; x=sort(x); k1=1 2 3 4 5; y1=; y2=; for i=1:lengt
2、h(k1) y1=y1,chi2pdf(x,k1(i); y2=y2,chi2cdf(x,k1(i); end plot(x,y1) figure;plot(x,y2)-0.500.511.5200.511.522.53-0.500.511.5200.10.20.30.40.50.60.70.80.9Gam 分布 x=-0.5:0.02:5; y1=; y2=; a1=1 1 2 1 3; lam1=1 0.2 1 2 1; for i=1:length(a1) y1=y1,gampdf(x,a1(i),lam1(i); y2=y2,gamcdf(x,a1(i),lam1(i); end pl
3、ot(x,y1) figure;plot(x,y2)-101234500.511.522.533.544.55-101234500.10.20.30.40.50.60.70.80.91泊松分布 x=0:15; y1=; y2=; lam1=1,2,5,10; for i=1:length(lam1) y1=y1,poisspdf(x,lam1(i); y2=y2,poisscdf(x,lam1(i); end stem(x,y1) line(x,y1) figure;plot(x,y2)05101500.050.10.150.20.250.30.350.405101500.10.20.30.40.50.60.70.80.91正态分布 x=-5:.02:5; y1=;y2=; mu1=-1,0,0,0,1;sig1=sqrt(1,0.1,1,10,1); for i=1:length(mu1) y1=y1,normpdf(x,mu1(i),sig1(i); y2=y2,normcdf(x,mu1(i),sig1(i); end plot(x,y1) figure; plot(x,y2)-5-4-3-2-101234500.20.40.60.811.21.4-5-4-3-2-101234500.10.20.30.40.50.60.70.80.91
