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);
7 K( H; m; K8 @: I" b1 S. ]# l- jz = A(:,3);
& r& G: L' F' f) h5 Rxlin = linspace(min(x),max(x),30);
( I' @& M) Y+ ]  mylin = linspace(min(y),max(y),30);
0 ^( L& d4 F: ^9 p0 E; @[X,Y] = meshgrid(xlin,ylin);
6 T, J$ K5 r+ n  {( k, U, u4 K& ]Z=griddata(x,y,z,xlin,ylin,'cubic');
5 n7 k+ b5 L8 `9 z+ l  rmesh(X,Y,Z) %interpolated
0 n9 }: I* ?" eaxis tight; hold on
: x; B4 u" E1 [" y, E, bplot3(x,y,z,'.','MarkerSize',15) %nonuniform
8 c. h4 y6 h* u* o3 [! r& A: l3 g
* ^' W5 h# a5 N: x! p3 ^输入后会出现如下提示：
6 V. {, a$ {8 ~Error in ==> delaunayn at 81
6 Q/ P- I4 j' B+ ?t = qhullmx(x', 'd ', opt);
7 c  |& L# ~" h8 ]Error in ==> griddata>cubic at 168
6 S( Y) u* E( K* H$ M2 r    tri = delaunayn([x(:) y(:)]);
Error in ==> griddata at 92
8 n$ e' L: L, a" B. V7 @# c" w    zi = cubic(x,y,z,xi,yi,opt);
& I6 X, p" r1 CError in ==> aa at 7
1 Q- a2 A# b) I* W/ j7 gZ=griddata(x,y,z,xlin,ylin,'cubic');