error with interpn function "Grid arrays must have NDGRID structure"
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Dear all,
I have two matrix a=10x2 and b= 10x2. they are the indipendent variables of an unknown function C(a,b)= 10x3. I would like to evaluate this function in Aq (100x2) and Bq (100x2) variable.
a % 10x2 matrix
b % 10x2 matrix
C % 10x3 matrix
% difine Aq 100x2 and Bq 100x2
a1=[min(a(:,1)):1:max(a(:,1))]';
a2=[min(a(:,2)):1:max(a(:,2))]';
Aq(:,1)=a1(1:100);
Aq(:,2)=a2(1:100);
b1=[min(b(:,1)):1:max(b(:,1))]';
b2=[min(b(:,2)):1:max(b(:,2))]';
Bq(:,1)=b1(1:100);
Bq(:,2)=b2(1:100);
%interp function C at Aq and Bq;
Cq = interpn(a,b,C,Aq,Bq)
I have this error
"Error using griddedInterpolant
Grid arrays must have NDGRID structure.
Error in interpn (line 151)
F = griddedInterpolant(X{:}, V, method,extrap);"
Why? what is wrong in my code?
thank you very much in advance
RR
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