我快疯了，怎么都是这个错误呢！

znas0707

??? Error using ==> chckxy at 51
The data sites should be distinct.
Error in ==> spline at 55
[x,y,sizey,endslopes] = chckxy(x,y);
Error in ==> emd>getspline at 54
s = spline([0 p N+1],[0 x(p) 0],1:N);
Error in ==> emd at 13
      s1 = getspline(x1);
Error in ==> Untitled38 at 37
imf = emd(y);
  什么程序都显示这个错误提示，各位高手你们给看看这是怎么回事呢？
本人是菜鸟，琢磨不透！