有关二维经验模态分解（BEMD）的问题
我尝试用二维经验模态分解（BEMD）对网格化数据进行分解的时候，matlab出现警告和报错，这是怎么回事？应该怎样修改能正常分解。警告部分；
Warning: Rank deficient, rank = 9998,tol = 1.4520e-010.
> In bemd>gridfit at 1036
In bemd>sift at 56
In bemd at 18
In testEMD at 14
Warning: Rank deficient, rank = 9999,tol = 1.3531e-010.
> In bemd>gridfit at 1036
In bemd>sift at 57
In bemd at 18
In testEMD at 14
报错部分：
??? Error using ==> bemd>gridfit at 823
Insufficient data for surface estimation.
Error in ==> bemd>sift at 57
= gridfit(ymin,xmin,zmin,y,x);
Error in ==> bemd at 18
= sift(h_func);
Error in ==> testEMD at 14
[ imf_matrix ] = bemd(data);
截图：
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