这个插值代码到底哪里错了嘛

gaoyuan_1993

A=load('频率.txt');
) V' q: @- z+ d& a! J, dx=A(:,1);y = A(:,2);
" ^4 `9 w9 S+ r5 F% s4 Fz = A(:,3);
, z4 y" X6 `: a. R# C" Dxlin = linspace(min(x),max(x),30);
8 x- d5 t3 Y. u2 S: i" d, Eylin = linspace(min(y),max(y),30);
, h0 I3 \1 M, Z" Z1 S- A[X,Y] = meshgrid(xlin,ylin);
6 y" U3 j5 a0 c7 S, c  D5 J& sZ=griddata(x,y,z,xlin,ylin,'cubic');
mesh(X,Y,Z) %interpolated
axis tight; hold on
plot3(x,y,z,'.','MarkerSize',15) %nonuniform

+ V% V6 w9 @0 x4 g1 H. j6 N输入后会出现如下提示：
( Z4 r1 k1 e$ Q/ S/ ZError in ==> delaunayn at 81
t = qhullmx(x', 'd ', opt);
Error in ==> griddata>cubic at 168
/ [  w' D& m  l2 a    tri = delaunayn([x(:) y(:)]);
Error in ==> griddata at 92
    zi = cubic(x,y,z,xi,yi,opt);
' w# C' V, i; E# U3 k3 n% y1 uError in ==> aa at 7
Z=griddata(x,y,z,xlin,ylin,'cubic');