这个插值代码到底哪里错了嘛

gaoyuan_1993

A=load('频率.txt');
) G, [  |2 r9 ]  G; G. T# tx=A(:,1);y = A(:,2);
z = A(:,3);
xlin = linspace(min(x),max(x),30);
+ e2 P5 g* V* R8 N1 s. P& K( Cylin = linspace(min(y),max(y),30);
[X,Y] = meshgrid(xlin,ylin);
3 F0 r, E7 @+ f6 N4 KZ=griddata(x,y,z,xlin,ylin,'cubic');
mesh(X,Y,Z) %interpolated
8 A; S% p& E3 T  q. M  Faxis tight; hold on
plot3(x,y,z,'.','MarkerSize',15) %nonuniform

0 |0 c2 L2 D8 j; p6 `2 B输入后会出现如下提示：
Error in ==> delaunayn at 81
* @6 q/ `7 ~7 V! mt = qhullmx(x', 'd ', opt);
9 g9 I8 d9 L9 Z+ w. zError in ==> griddata>cubic at 168
    tri = delaunayn([x(:) y(:)]);
Error in ==> griddata at 92
    zi = cubic(x,y,z,xi,yi,opt);
( b6 @) k; q" J2 h/ v3 mError in ==> aa at 7
Z=griddata(x,y,z,xlin,ylin,'cubic');