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 t5 u8 w1 N5 k% J+ Y' A  S" ?/ z- y$ Pz = A(:,3);
; M+ b, Y% `) t- j# s* T! yxlin = linspace(min(x),max(x),30);
ylin = linspace(min(y),max(y),30);
6 a/ o- ^  r! l- ]7 B& k[X,Y] = meshgrid(xlin,ylin);
, W/ Q- O! @3 m9 ?Z=griddata(x,y,z,xlin,ylin,'cubic');
+ K+ S* y, a4 e6 Ymesh(X,Y,Z) %interpolated
  m% A1 n# I+ I. k" H( A4 x3 `( Jaxis tight; hold on
; Q# D) |' m/ [3 h' q) [+ M/ Xplot3(x,y,z,'.','MarkerSize',15) %nonuniform
4 H; u! G7 j4 c3 T' I8 v
输入后会出现如下提示：
* s, r" H9 I0 q) ~Error in ==> delaunayn at 81
t = qhullmx(x', 'd ', opt);
) H& B, Q$ S: Z+ o- t- @# P$ I# TError in ==> griddata>cubic at 168
0 Q. K( I) C0 }0 c! ?. F    tri = delaunayn([x(:) y(:)]);
* M1 g/ ~& Y& f! {* TError 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');
: k4 g  \2 x& R+ P, u6 ?