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Smooth函数：loadcount.dat;c=smooth(count(:));C1=reshape(c,24,3);subplot(3,1,1);plot(count,':');holdon;plot(C1,'-');C2=zeros(24,3);forI=1:3C2(:,I)=smooth(count(:,I));end;subplot(3,1,2);plot(count,':');holdon;plot(C2,'-');subplot(3,1,3);plot(C2-C1,'o-');x=15*rand(150,1);y=sin(x)+0.5*(rand(size(x))-0.5);y(ceil(length(x)*rand(2,1)))=3;noise=normrnd(0,15,150,1);y=y+noise;yy1=smooth(x,y,0.1,'loess');yy2=smooth(x,y,0.1,'rloess');yy3=smooth(x,y,0.1,'moving');yy4=smooth(x,y,0.1,'lowess');yy5=smooth(x,y,0.1,'sgolay');yy6=smooth(x,y,0.1,'rlowess');[xx,ind]=sort(x);subplot(3,2,1);plot(xx,y(ind),'b-.',xx,yy1(ind),'r-');subplot(3,2,2);plot(xx,y(ind),'b-.',xx,yy2(ind),'r-');subplot(3,2,3);plot(xx,y(ind),'b-.',xx,yy3(ind),'r-');subplot(3,2,4);plot(xx,y(ind),'b-.',xx,yy4(ind),'r-');subplot(3,2,5);plot(xx,y(ind),'b-.',xx,yy5(ind),'r-');subplot(3,2,6);plot(xx,y(ind),'b-.',xx,yy6(ind),'r-');Smoothts函数：x=122+rand(500,4);p=x(:,4)';out1=smoothts(p,'b',30);out2=smoothts(p,'b',100);out3=smoothts(p,'g',30);out4=smoothts(p,'g',100,100);out5=smoothts(p,'e',30);out6=smoothts(p,'e',100);subplot(2,2,1);plot(p);subplot(2,2,2);plot(out1,'k');holdon;plot(out2,'m.');subplot(2,2,3);plot(out3,'k');holdon;plot(out4,'m.');subplot(2,2,4);plot(out5,'k');holdon;plot(out6,'m.');Medfilt1函数：x=linspace(0,2*pi,250)';y=sin(x)*150;y(ceil(length(x)*rand(2,1)))=3;noise=normrnd(0,15,250,1);y=y+noise;subplot(1,2,1);plot(x,y);yy=medfilt1(y,50);subplot(1,2,2);plot(x,y,'r-.');holdon;plot(x,yy,'.');直方图：Hist函数：x=randn(499,1);y=randn(499,3);subplot(3,1,1);hist(x);subplot(3,1,2);hist(x,100);subplot(3,1,3);hist(y,25);Histc函数：x=-3.9:0.1:3.9;y=randn(10000,1);subplot(1,2,1);hist(y,x);n=histc(y,x);c=cumsum(n);subplot(1,2,2);bar(x,c);Histfit函数：r=normrnd(10,1,10,1);histfit(r);h=get(gca,'Children');盒子图：N=1024;x1=normrnd(5,1,N,1);x2=normrnd(6,1,N,1);x=[x1x2];subplot(2,2,1);sym1='*';notch1=1;boxplot(x,notch1,sym1);subplot(2,2,2);notch2=0;boxplot(x,notch2);x=randn(100,25);subplot(2,1,1);boxplot(x);误差条图：x=0:pi/10:pi;y=sin(x);e=std(y)*ones(size(x));errorbar(x,y,e)最小二乘法拟合直线：x=1:10;y1=x+rand(1,10);scatter(x,y1,25,'b','*')holdon;y2=2*x+randn(1,10);plot(x,y2,'mo')y3=3*x+randn(1,10);plot(x,y3,'rx:');y4=4*x+randn(1,10);plot(x,y4,'g+--');帕累托图：codelines=[200120555608102410157687];coders={'Fred','Ginger','Norman','Max','Julia','Wally','Heidi','Pat'};pareto(codelines,coders)QQ图：M=100;N=1;x=normrnd(0,1,M,N);y=rand(M,N);z=[x,y];subplot(2,2,1);h1=qqplot(z);gridon;x=normrnd(0,1,100,1);y=normrnd(0.5,2,50,1);subplot(2,2,2);h2=qqplot(x,y);gridon;x=normrnd(5,1,100,1);y=weibrnd(2,0.5,100,1);subplot(2,2,3);h3=qqplot(x,y);gridon;subplot(2,2,4);x=normrnd(10,1,100,1);subplot(2,2,4);qqplot(x);回归残差图：X=[ones(10,1)(1:10)'];y=X*[10;1]+normrnd(0,0.1,10,1);[b,bint,r,rint]=regress(y,X,0.06);rcoplot(r,rint);多项式拟合曲线：p=[1-2-10];t=0:0.1:3;y=polyval(p,t)+0.5*randn(size(t));plot(t,y,'ro');h=refcurve(p);set(h,'Color','r');q=polyfit(t,y,3);refcurve(q);参考线：x=1:10;y=x+randn(1,10);scatter(x,y,25,'b','*');lsline;Noallowedlinetypesfound.Nothingdone.mu=mean(y);hline=refline([0mu]);set(hline,'Color','r');正态概率图：M=100;N=1;x=normrnd(0,1,M,N);y=rand(M,N);z=[x,y];h=normplot(z);gridon;点的标签：loadcities;education=ratings(:,6);arts=ratings(:,7);plot(education,arts,'+');gname(names)工序能力指数：data=normrnd(1,1,30,1);[p,cp,cpk]=capable(data,[-3,3])p=0.0245cp=1.0284cpk=0.6562规定区间的正态分布密度图：p=normspec([10Inf],11.5,1.25);gridon;标准差管理图：loadparts;schart(runout);gridon;均值管理图：loadparts;xbarplot(runout);gridon;