基于MATLAB的数据处理与统计作图概要Word文件下载.docx
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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);
xx,yy2(ind),'
subplot(3,2,3);
xx,yy3(ind),'
subplot(3,2,4);
xx,yy4(ind),'
subplot(3,2,5);
xx,yy5(ind),'
subplot(3,2,6);
xx,yy6(ind),'
Smoothts函数:
x=122+rand(500,4);
p=x(:
4)'
;
out1=smoothts(p,'
b'
30);
out2=smoothts(p,'
100);
out3=smoothts(p,'
g'
out4=smoothts(p,'
100,100);
out5=smoothts(p,'
e'
out6=smoothts(p,'
subplot(2,2,1);
plot(p);
subplot(2,2,2);
plot(out1,'
k'
plot(out2,'
m.'
subplot(2,2,3);
plot(out3,'
plot(out4,'
subplot(2,2,4);
plot(out5,'
plot(out6,'
Medfilt1函数:
x=linspace(0,2*pi,250)'
y=sin(x)*150;
noise=normrnd(0,15,250,1);
subplot(1,2,1);
plot(x,y);
yy=medfilt1(y,50);
subplot(1,2,2);
plot(x,y,'
r-.'
plot(x,yy,'
.'
直方图:
Hist函数:
x=randn(499,1);
y=randn(499,3);
hist(x);
hist(x,100);
hist(y,25);
Histc函数:
x=-3.9:
0.1:
3.9;
y=randn(10000,1);
hist(y,x);
n=histc(y,x);
c=cumsum(n);
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];
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,'
'
)
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);
h2=qqplot(x,y);
x=normrnd(5,1,100,1);
y=weibrnd(2,0.5,100,1);
subplot(2,2,3);
h3=qqplot(x,y);
subplot(2,2,4);
x=normrnd(10,1,100,1);
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:
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:
y=x+randn(1,10);
scatter(x,y,25,'
lsline;
Noallowedlinetypesfound.Nothingdone.
mu=mean(y);
hline=refline([0mu]);
set(hline,'
正态概率图:
h=normplot(z);
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=
0.0245
cp=
1.0284
cpk=
0.6562
规定区间的正态分布密度图:
p=normspec([10Inf],11.5,1.25);
标准差管理图:
loadparts;
schart(runout);
均值管理图:
xbarplot(runout);
gridon;