这个插值代码到底哪里错了嘛

gaoyuan_1993

A=load('频率.txt');
, N6 a4 r& ]0 ux=A(:,1);y = A(:,2);
z = A(:,3);
, F( b% A! R. s4 L$ V: U$ wxlin = linspace(min(x),max(x),30);
5 e7 [* `$ }% P* z  X4 Dylin = linspace(min(y),max(y),30);
[X,Y] = meshgrid(xlin,ylin);
Z=griddata(x,y,z,xlin,ylin,'cubic');
mesh(X,Y,Z) %interpolated
8 Q- q0 f- n8 ~3 l! Naxis tight; hold on
( g8 B7 `) y, D+ v. ]7 g5 H8 t, F/ Fplot3(x,y,z,'.','MarkerSize',15) %nonuniform
$ n8 S1 x+ U: a& w
( w: E0 B9 R" E输入后会出现如下提示：
Error in ==> delaunayn at 81
3 X4 ]' S8 ]- e) x. A1 |5 at = qhullmx(x', 'd ', opt);
Error in ==> griddata>cubic at 168
4 z# E& L- D' y2 V3 O    tri = delaunayn([x(:) y(:)]);
- D& I; e( M8 f: aError in ==> griddata at 92
    zi = cubic(x,y,z,xi,yi,opt);
Error in ==> aa at 7
Z=griddata(x,y,z,xlin,ylin,'cubic');