About interpolation of two-dimensional matrix question

My matrix

 A=[12 3 65,2 3 6,68 15 40,66 98 12]

A is 3*4

x=[19 20 21]

x is 1*3

y=[118 119 120 121]

y is 1*4

zz=interp2(x,y,A,xlat,xlon,'cubic');   xlat=12*21 ,xlon=12*21

but it shows error

Error using griddedInterpolant
The grid vectors do not define a grid of points that match the given values.

Error in interp2>makegriddedinterp (line 228)
    F = griddedInterpolant(varargin{:});

Error in interp2 (line 128)
        F = makegriddedinterp({X, Y}, V, method,extrap);

How can fix it?

thanks

Answer 1

[KSSV]

Try this....I think your A is not a matrix, it is a array, so error popped out.

clc; clear all ;
A = [12 3 65 ; 2 3 6 ;68 15 40 ;66 98 12] ;
x=[19 20 21]; 
y=[118 119 120 121] ;
xlat=12*21 ;xlon=12*21 ;
zz=interp2(x,y,A,xlat,xlon,'cubic');