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);
. {1 k$ v1 {( Q. ]- O& t" c- @* Jz = A(:,3);
xlin = linspace(min(x),max(x),30);
ylin = linspace(min(y),max(y),30);
$ n: a# `/ J) Y5 k# }" M/ S  `[X,Y] = meshgrid(xlin,ylin);
2 k2 Y( i* a( u' [Z=griddata(x,y,z,xlin,ylin,'cubic');
mesh(X,Y,Z) %interpolated
0 E- q2 d8 j: c  ]: _; Waxis tight; hold on
" O4 ]/ x9 k. q/ r9 I- Pplot3(x,y,z,'.','MarkerSize',15) %nonuniform

输入后会出现如下提示：
# L- D# h6 ?" q5 Z7 \Error in ==> delaunayn at 81
3 o: T  b8 t( N# G/ H  z- G5 Zt = qhullmx(x', 'd ', opt);
5 }) g! O+ a2 n% i' I/ \6 `Error in ==> griddata>cubic at 168
    tri = delaunayn([x(:) y(:)]);
+ B: A7 r! G6 c0 `( }Error in ==> griddata at 92
# ~3 j# E( ~4 t+ H! s2 B( u) _    zi = cubic(x,y,z,xi,yi,opt);
Error in ==> aa at 7
5 q* R# u9 ?6 g  y  h. aZ=griddata(x,y,z,xlin,ylin,'cubic');
- f, t; j' X) c/ A# ?