这个插值代码到底哪里错了嘛

gaoyuan_1993

A=load('频率.txt');
4 U( q$ W, M$ d& g' }7 \9 hx=A(:,1);y = A(:,2);
z = A(:,3);
xlin = linspace(min(x),max(x),30);
ylin = linspace(min(y),max(y),30);
[X,Y] = meshgrid(xlin,ylin);
0 j, J6 G, V3 J% bZ=griddata(x,y,z,xlin,ylin,'cubic');
! J, G: N" g+ B6 W4 X- Bmesh(X,Y,Z) %interpolated
axis tight; hold on
" b/ N2 K0 R8 W: l/ O! M1 bplot3(x,y,z,'.','MarkerSize',15) %nonuniform

输入后会出现如下提示：
Error in ==> delaunayn at 81
t = qhullmx(x', 'd ', opt);
9 x7 d  A& G' rError in ==> griddata>cubic at 168
4 ^) ~2 F# w9 r& A4 i% j    tri = delaunayn([x(:) y(:)]);
( [4 d/ k! D  X0 B. IError in ==> griddata at 92
    zi = cubic(x,y,z,xi,yi,opt);
! \8 K% K+ \" iError in ==> aa at 7
# ~. d3 Z" A/ a6 h- ZZ=griddata(x,y,z,xlin,ylin,'cubic');