Interpolation of an array of values
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Pranjal Pathak
el 5 de Nov. de 2013
Comentada: G A
el 13 de Nov. de 2013
Hi,
I have an array of values which is not a square one(different rows have different number of elements and they are placed in such a way that the first element (i.e. 1) of second row is placed in the mid of first two elements (i.e. 3 & 5) of the first row and so on). I want to interpolate (bi-linear) this matrix into a square matrix of dimension 36x36.
A = [3 5 8 9 1 4;
1 6 9 2 5;
6 7 8 9 10 12;
2 5 1 3 4;
1 2 4 6 8 9;
3 1 4 5 8];
Can anybody please help me in doing this in Matlab.
Thanking You!
2 comentarios
Jan
el 5 de Nov. de 2013
This is not a matrix. Matrices have the same number of elements in each row by definition. Therefore the shown definition of A is not clear. In consequence we cannot guess how your input is represented and this does not allow to guess which kind of procedure you are looking for.
Please edit the question and show us, how your input matrix A is defined in a way, Matlab does understand.
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G A
el 6 de Nov. de 2013
Do you mean something like this?
A = {[3 5 8 9 1 4];
[1 6 9 2 5];
[6 7 8 9 10 12];
[2 5 1 3 4];
[1 2 4 6 8 9];
[3 1 4 5 8]};
dim1=36;
dim2=36;
B=zeros(length(A),dim2);
for k=1:length(A)
x1=1:length(A{k});
x2=linspace(1,length(x1),dim2);
B(k,:)=interp1(x1,A{k},x2,'linear');
end
x3=1:length(A);
x4=linspace(1,length(x3),dim1);
C=zeros(dim1,dim2);
for k=1:dim2
C(:,k)=interp1(x3,B(:,k),x4,'linear');
end
4 comentarios
G A
el 13 de Nov. de 2013
If dim1=dim2, then interpolation step size, as I understand your question, is the same in both directions. Or do you mean something else?
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