这个插值代码到底哪里错了嘛

gaoyuan_1993

A=load('频率.txt');
5 |! P, A; ]# F8 s) Ux=A(:,1);y = A(:,2);
z = A(:,3);
xlin = linspace(min(x),max(x),30);
ylin = linspace(min(y),max(y),30);
[X,Y] = meshgrid(xlin,ylin);
Z=griddata(x,y,z,xlin,ylin,'cubic');
mesh(X,Y,Z) %interpolated
+ a& G- U& y! j; f* Jaxis tight; hold on
plot3(x,y,z,'.','MarkerSize',15) %nonuniform
# E2 C& z) m; i1 Y5 g
输入后会出现如下提示：
/ ]$ V& o, A0 p  l' R& s  {Error in ==> delaunayn at 81
% N6 J$ b7 d- Dt = qhullmx(x', 'd ', opt);
1 ~. N" @3 p9 E/ L$ J5 WError in ==> griddata>cubic at 168
% e; v2 z6 m/ i$ \    tri = delaunayn([x(:) y(:)]);
7 e: h2 M+ q! X3 K+ C2 ]Error in ==> griddata at 92
    zi = cubic(x,y,z,xi,yi,opt);
7 R3 v9 U  T9 d* UError in ==> aa at 7
7 g0 y( V. C6 ?  d0 G- B0 @Z=griddata(x,y,z,xlin,ylin,'cubic');
/ q4 }6 @0 V7 g: p9 J- P