基于MATLAB的数据处理与统计作图概要.doc

基于MATLAB的数据处理与统计作图概要.doc基于MATLAB的数据处理与统计作图概要
基于MATLAB的数据处理与统计作图概要
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基于MATLAB的数据处理与统计作图概要
Smooth 函数：
load ;
c=smooth(count(:));
C1=reshape(c,24,3);
subplot(3,1,1);plot(count,':');
hold on;
plot(C1,'-');
C2=zeros(24,3);
for I=1:3
C2(:,I)=smooth(count(:,I));
end;
subplot(3,1,2);plot(count,':');hold on;
plot(C2,'-');
subplot(3,1,3);plot(C2-C1,'o-');
>> x=15*rand(150,1);
y=sin(x)+*(rand(size(x))-);
y(ceil(length(x)*rand(2,1)))=3;
noise=normrnd(0,15,150,1);
y=y+noise;
yy1=smooth(x,y,,'loess');
yy2=smooth(x,y,,'rloess');
yy3=smooth(x,y,,'moving');
yy4=smooth(x,y,,'lowess');
yy5=smooth(x,y,,'sgolay');
yy6=smooth(x,y,,'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');hold on;plot(out2,'m.');
subplot(2,2,3);plot(out3,'k');hold on;plot(out4,'m.');
subplot(2,2,4);plot(out5,'k');hold on;plot(out6,'m.');
基于MATLAB的数据处理与统计作图概要
基于MATLAB的数据处理与统计作图概要
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基于MATLAB的数据处理与统计作图概要
Medfilt1 函数：
x=linspace(0,2*pi,250)';
y=sin(x)*150;
y(ceil(length(x)*rand(2,1)))=3;
noise=normrnd(0,15,25