这个插值代码到底哪里错了嘛

gaoyuan_1993

A=load('频率.txt');
x=A(:,1);y = A(:,2);
0 a6 f  o- W. bz = A(:,3);
! |4 @6 ]" T4 y8 Bxlin = linspace(min(x),max(x),30);
ylin = linspace(min(y),max(y),30);
5 |+ [1 t( C2 A( X% o[X,Y] = meshgrid(xlin,ylin);
4 P. x2 N# i* i8 `Z=griddata(x,y,z,xlin,ylin,'cubic');
- E# b8 W& P( P! J- lmesh(X,Y,Z) %interpolated
' z" Y; x. X" @4 q% y7 k0 [! Daxis tight; hold on
& }7 P) i. J) U- [- k  e, _plot3(x,y,z,'.','MarkerSize',15) %nonuniform

输入后会出现如下提示：
Error in ==> delaunayn at 81
t = qhullmx(x', 'd ', opt);
Error in ==> griddata>cubic at 168
    tri = delaunayn([x(:) y(:)]);
Error in ==> griddata at 92
( y6 X8 U5 \: h" Y  f( q. \/ o    zi = cubic(x,y,z,xi,yi,opt);
9 L$ |! j. r5 h+ p; x0 j- oError in ==> aa at 7
6 d  f2 u- S( M% l& j* `5 bZ=griddata(x,y,z,xlin,ylin,'cubic');