clearclc
?close?all
?%%%%%%　小波變換　%%%%%%%%%%%%%%%%
?fs=1024;
?t=1/fs:1/fs:1;
?f1=100;f2=200;f3=300;
?s=cos（2*pi*f1*t.*（t>=0&t<0.3））+2*cos（2*pi*f2*t.*（t>=0.3&t<0.8））+3*sin（2*pi*f3*t.*（t>=0.8&t<=1））;
?%s=cos（2*pi*f1*t）;
?subplot（211）
?plot（ts‘b‘）
?title（‘原始單頻信號‘）

?%%%%%%%%%%%%%%%%%%%%%%%?小波時頻圖繪制?%%%%%%%%%%%%%%%%%%%%%
?wavename=‘cmor4-4‘;%%選用帶寬參數和中心頻率均為4?的復morlet小波