简单信号的HHT谱
看了一篇文献，有如下的疑问：文献题目：A Tour of the Tour of the Hilbert-Huang Transform An Empirical Tool for Signal Analysis
里面有对静态，非静态，线性和非线性信号的HHT谱的图
信号如图file:///C:/Documents%20and%20Settings/Administrator/桌面/signal
作者处理的HHT谱如图file:///C:/Documents%20and%20Settings/Administrator/桌面/hhtspec
我用法国人的程序处理这四个信号，只有非静止非线性信号能画出HHT谱，其它都画不出来，matlab出错为：
??? Output argument "A" (and maybe others) not assigned during call to "C:\Program Files\MATLAB\R2006b\toolbox\hht\emd\hhspectrum.m (hhspectrum)".
Error in ==> hhspectrum at 20
if nargin < 2**主要是这个位置的问题**
Error in ==> fourtypesignalhht at 16
=hhspectrum(imfx2);
但我又不知问题在哪里？望赐教 都能做出来啊. 能做出来,能做出来
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