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);
- u0 U8 A- l2 j, i- f: Z1 _z = A(:,3);
xlin = linspace(min(x),max(x),30);
ylin = linspace(min(y),max(y),30);
( a# |9 S. b8 O1 g. j; R; L6 W* s[X,Y] = meshgrid(xlin,ylin);
Z=griddata(x,y,z,xlin,ylin,'cubic');
mesh(X,Y,Z) %interpolated
. C: E# x: ~1 _3 z* yaxis tight; hold on
plot3(x,y,z,'.','MarkerSize',15) %nonuniform
. X# V# x  E/ o4 B- d% ^% z3 a" G
; l2 K( ~' `( J' q! e7 E" o/ P$ u输入后会出现如下提示：
Error in ==> delaunayn at 81
. ]- `; c: Z5 H" {- jt = qhullmx(x', 'd ', opt);
Error in ==> griddata>cubic at 168
+ |9 A5 i. W0 d" u    tri = delaunayn([x(:) y(:)]);
Error in ==> griddata at 92
    zi = cubic(x,y,z,xi,yi,opt);
Error in ==> aa at 7
+ v+ c. o4 ?) |8 {0 F) H  \Z=griddata(x,y,z,xlin,ylin,'cubic');