这个插值代码到底哪里错了嘛

gaoyuan_1993

A=load('频率.txt');
. L7 a, C8 b* Q2 @0 e3 _x=A(:,1);y = A(:,2);
+ R9 z! R1 S4 c1 ~z = A(:,3);
xlin = linspace(min(x),max(x),30);
ylin = linspace(min(y),max(y),30);
[X,Y] = meshgrid(xlin,ylin);
Z=griddata(x,y,z,xlin,ylin,'cubic');
mesh(X,Y,Z) %interpolated
" E# V/ S2 C7 e; P) e& Gaxis tight; hold on
  H( j, X/ ~9 U  Z0 f4 Z2 rplot3(x,y,z,'.','MarkerSize',15) %nonuniform
! }# e# l5 L( o; W* B
输入后会出现如下提示：
Error in ==> delaunayn at 81
# K7 b/ L# J* C/ u! o- T1 et = qhullmx(x', 'd ', opt);
Error in ==> griddata>cubic at 168
    tri = delaunayn([x(:) y(:)]);
Error in ==> griddata at 92
' n3 M7 j; ~0 k" B5 U& c    zi = cubic(x,y,z,xi,yi,opt);
; x, N8 l: l, D: X7 D$ kError in ==> aa at 7
3 D& G1 x) S2 |/ h7 j7 ?: U2 a' ~% VZ=griddata(x,y,z,xlin,ylin,'cubic');
! h: B& y, G& r! A4 u9 L0 G$ K