小波分析示例
一维连续小波
1. coefs = cwt(s,scale,’wname’) 2. coefs = cwt(s,scale,’wname’,’plot’) c=cwt(noissin,1:48,'db4','plot');
Absolute Values of Ca,b Coefficients for a = 1 2 3 4 5 ...
1.5
46 43
1
40 37 34 31 28 25 22 19 16 13 10 7 4 1
0 100 200 300 400 500 600 700 800 900 1000
0.5
0
-0.5
-1
-1.5
scales a
100
200
300
400 500 600 time (or space) b
700
800
900
1000
3