这个插值代码到底哪里错了嘛

gaoyuan_1993

A=load('频率.txt');
/ F$ F! W2 N5 v$ Xx=A(:,1);y = A(:,2);
z = A(:,3);
xlin = linspace(min(x),max(x),30);
ylin = linspace(min(y),max(y),30);
  l+ K& f. f( j- M7 D' w[X,Y] = meshgrid(xlin,ylin);
1 r* m  F* N1 ZZ=griddata(x,y,z,xlin,ylin,'cubic');
" b! G# o6 r$ V# f/ k) r# T0 fmesh(X,Y,Z) %interpolated
! \( l  B+ W5 Caxis tight; hold on
; p1 `2 Q. F; T* \# O7 Zplot3(x,y,z,'.','MarkerSize',15) %nonuniform

+ l, k( d) g" G/ y  `5 m输入后会出现如下提示：
. d* o0 m! z+ t0 t+ q4 _. O. @Error in ==> delaunayn at 81
* z& j' l+ N5 r, r6 R. Tt = qhullmx(x', 'd ', opt);
Error in ==> griddata>cubic at 168
5 ~$ W+ D" B4 B. ^9 P! L    tri = delaunayn([x(:) y(:)]);
Error in ==> griddata at 92
- d! W3 ?/ I% \7 j  z  N$ |    zi = cubic(x,y,z,xi,yi,opt);
' e) X) K2 v$ N0 NError in ==> aa at 7
: |& K. d' X) IZ=griddata(x,y,z,xlin,ylin,'cubic');
' v' E+ C0 _5 |0 V