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);
* ^2 d# I1 a) _z = A(:,3);
1 o' A2 C) C9 l! R( |, n* |% O; ~xlin = linspace(min(x),max(x),30);
5 F$ i9 _+ X1 s, E2 Y# ?% w! D1 I) Oylin = linspace(min(y),max(y),30);
- x- M4 |' G5 r- g6 B  s[X,Y] = meshgrid(xlin,ylin);
7 }! B, W  p$ A" _% j' R' BZ=griddata(x,y,z,xlin,ylin,'cubic');
mesh(X,Y,Z) %interpolated
axis tight; hold on
plot3(x,y,z,'.','MarkerSize',15) %nonuniform

输入后会出现如下提示：
: ]) X0 g0 f# z! vError in ==> delaunayn at 81
8 l' r. i, G' b3 K! d( Qt = qhullmx(x', 'd ', opt);
2 K$ [) l* N+ Z( i/ S+ QError in ==> griddata>cubic at 168
    tri = delaunayn([x(:) y(:)]);
Error in ==> griddata at 92
    zi = cubic(x,y,z,xi,yi,opt);
+ s4 o' L% e  ^- F! ~2 xError in ==> aa at 7
4 I5 ?: j6 G: i7 ^/ a( f3 KZ=griddata(x,y,z,xlin,ylin,'cubic');