euclidean distance between two cell.

Hello,

i have two cell.

Z1={1x3}{1z3} Z2={1x3}{1x3}{1x3}

i need euclidean distance between Z1 a Z2.

can anyone help ?

Thanks.

[Kevin Claytor]

Please elaborate?

Euclidean distance is typically between two points eg; (x1,y1) and (x2,y2).

Are the contents of Z1 and Z2 a pair of points? Are the contents of Z1 one half of the pair and the contents of Z2 another half?

Additionally your two cell matrices are of different size, do you want Euclidean distance between the contents of every cell in Z1 to every cell in Z2, or between corresponding cells in Z1 to Z2?

[Tomas]

Z1 contais matrix 1x3 ,1x3 - for example Z1{1}=[1x3 double], [1x3 double]

Z2 contains matrix 1x3 1x3 1x3 - for example Z2{1}= [1x3 double], [1x3 double], [1x3 double]

I need euclidean distance between each point between Z{1} and Z{2}. Matrix[1x3] represents in cell Z1 or Z2 one point with 3 coordinates.

Thanks.

Answer 1

[Mischa Kim]

Thomas, use

pdist([reshape(cell2mat(Z1),2,3); reshape(cell2mat(Z2),3,3)])

assumming that Z1 contains two cells of 1-by-3's, and Z2 contains three cells of 1-by-3's.

[Tomas]

I can not use pdist, I have to use a own function

[Mischa Kim]

How about:

 Z = [reshape(cell2mat(Z1),2,3); reshape(cell2mat(Z2),3,3)]';

 kk = 1;
 for ii = 1:length(Z(1,:))
     for jj = (ii+1):length(Z(1,:))
         dist(kk) = norm(Z(:,ii) - Z(:,jj));
         kk = kk + 1;
     end
 end

[Tomas]

will work for different lengths Z1 or Z2 ?

[Mischa Kim]

Well, it works for your specific requirements, but you can easily generalize it. In

cell2mat(Z1),2,3

the 2 denotes the number of vectors, 3 , the length of each vector. Same applies to Z2.

Does that answer your question?

[Tomas]

Ok, i understand. Thank you for your help