www.pudn.com > Eliminate-the-trend-method.zip > 两种方法对比.m, change:2012-05-04,size:2416b


 clc 
 t=[0 0.004 0.008 0.012 0.016 0.020 0.024 0.028 0.032 0.036 0.040 0.044 0.048 0.052 0.056 0.060 0.064 0.068 0.072 0.076 0.080 0.084 0.088 0.092 0.096 0.100 0.104 0.108 0.112 0.116 0.120 0.124 0.128 0.132 0.136 0.140 0.144 0.148 0.152 0.156]; 
 x=[-0.45  
     -0.41  
-0.43  
-0.40 
-0.47  
-0.40 
-0.35  
-0.37 
-0.39  
-0.33 
-0.35 
-0.31  
-0.33  
-0.35 
-0.30 
-0.32  
-0.40  
-0.22  
-0.66 
-0.31  
-0.77  
-0.40 
-0.44  
-0.41 
-0.50  
-0.45  
-0.55 
-0.47 
-0.60  
-0.40  
-0.78  
-0.72 
-0.80  
-0.83  
-0.78 
-0.89  
-0.80  
-0.90  
-0.77  
-0.99  ]; 
 y=[0.000992626205331915 
0.0265181726951439 
-0.00731406945742547 
0.00966786674103753 
-0.0723762198706223 
-0.0132986986081293 
0.0270358930582235 
-0.00124915049642638 
-0.0280427030515099 
0.0267541934589730 
0.00322832894645292 
0.0414543251677920 
0.0214946357252832 
0.00339954606665049 
0.0572071734850490 
0.0429434671190648 
-0.0293777920472850 
0.160245008815448 
-0.268198685617858 
0.0952684011731089 
-0.349388622445911 
0.0377831837362539 
0.0127245917762081 
0.0673642055759856 
-0.000381539116948382 
0.0733916252903027 
-0.00142420176393387 
0.105050911004101 
0.00268472672359588 
0.231332840369172 
-0.119161321239119 
-0.0289664994357952 
-0.0782636037099422 
-0.0772457117052153 
0.00388193078016053 
-0.0750980902066072 
0.0455846432271185 
-0.0243116191805925 
0.134959204153759 
-0.0568689733408960]; 
y1=[-0.0114814814814815	0.0203703703703704	-0.00481481481481483	0.0233333333333333	-0.0548148148148147	0.00185185185185188	0.0344444444444444	0.00185185185185183	-0.0292592592592593	0.0207407407407407	-0.0103703703703703	0.0225925925925926	-0.00148148148148153	-0.0214814814814815	0.0274074074074074	0.0185185185185185	-0.0451851851851852	0.182222222222222	-0.214444444444445	0.188148148148148	-0.267037037037037	0.0955555555555556	0.0233333333333334	0.0485185185185186	-0.0370370370370370	0.0362962962962963	-0.0507407407407408	0.0492592592592593	-0.0599999999999999	0.192592592592593	-0.125185185185185	0.00555555555555565	-0.0270370370370371	-0.0262962962962963	0.0422222222222221	-0.0492592592592593	0.0674074074074074	0	                 0	               0 
]; 
 plot(t,x,':',t,y,t,y1,'-.'); 
%在图幅上添加坐标网格 
 grid on; 
 %当前轴及图形保持而不被刷新,准备接受此后将绘制 
 hold on; 
 %添加横坐标轴的标注 
 xlabel('时间(s)'); 
 %添加纵坐标轴的标注 
 ylabel('位移  mm'); 
 legend('输入','最小二乘法','滑动平均法');