这个插值代码到底哪里错了嘛

gaoyuan_1993

A=load('频率.txt');
& T) [5 s$ i8 f1 l5 Fx=A(:,1);y = A(:,2);
z = A(:,3);
xlin = linspace(min(x),max(x),30);
  l8 L3 T- f* E* E1 E: H5 ?ylin = linspace(min(y),max(y),30);
[X,Y] = meshgrid(xlin,ylin);
Z=griddata(x,y,z,xlin,ylin,'cubic');
, Z! g/ O* t! o* e6 [mesh(X,Y,Z) %interpolated
axis tight; hold on
: C- @" o8 V1 @" ]plot3(x,y,z,'.','MarkerSize',15) %nonuniform
- e; I' o$ {: M
输入后会出现如下提示：
5 {' L1 }# M. N) E, Y; f' N% U$ ]Error in ==> delaunayn at 81
t = qhullmx(x', 'd ', opt);
Error in ==> griddata>cubic at 168
    tri = delaunayn([x(:) y(:)]);
$ \, u- z2 {: Y8 G9 `5 K1 v% YError in ==> griddata at 92
0 f  x0 z7 y, r( L) j' c9 C' N    zi = cubic(x,y,z,xi,yi,opt);
Error in ==> aa at 7
  M0 P: t; J) |5 g. Y5 b7 J4 AZ=griddata(x,y,z,xlin,ylin,'cubic');
) K9 O& l- u  e1 k* U