求助：用matlab做空间面板

[风扬秋野]

求助高手：
用matlab做空间面板的检验和估计的时候，提示如下；
Warning: NaN found in Y, interpolation at undefined values
will result in undefined values.
Warning: All data points with NaN in their value will be ignored.
??? Error using ==> chckxy at 106
There should be at least two data points.

Error in ==> spline at 55
[x,y,sizey,endslopes] = chckxy(x,y);

Error in ==> interp1 at 279
yiMat = spline(xCol.',yMat.',xiCol.').';

Error in ==> sar>sar_lndet at 455
outi = interp1(out.rho,out.lndet,tt','spline');

Error in ==> sar at 117
[detval,time1] = sar_lndet(ldetflag,W,rmin,rmax,detval,order,miter);

Error in ==> lmsar at 49
res = sar(y,x,W1);
哪位高手知道这是什么意思？出了什么问题？有什么解决办法没？先谢谢了……