这个插值代码到底哪里错了嘛

gaoyuan_1993

A=load('频率.txt');
$ m' I9 q3 |4 l$ W' F6 T' n3 Gx=A(:,1);y = A(:,2);
& q- ]" D+ A9 p# mz = A(:,3);
xlin = linspace(min(x),max(x),30);
; v- Z. l- Y" D- wylin = linspace(min(y),max(y),30);
; }( S/ J6 G7 g9 f4 d[X,Y] = meshgrid(xlin,ylin);
6 @, t0 Q1 y% c, hZ=griddata(x,y,z,xlin,ylin,'cubic');
mesh(X,Y,Z) %interpolated
axis tight; hold on
plot3(x,y,z,'.','MarkerSize',15) %nonuniform

7 h$ j( d1 h/ O输入后会出现如下提示：
Error in ==> delaunayn at 81
* r) G: m, h+ Xt = qhullmx(x', 'd ', opt);
3 e. ?- }  ]* h7 sError in ==> griddata>cubic at 168
    tri = delaunayn([x(:) y(:)]);
9 |* n/ v, i3 x) XError 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');