MATLAB: NANMEANs for each (n,m) position over several matrices with the same size

nanmean

Hi all,

I have a number of matrices with the same size. What I need is a nanmean for each position of the matrices over all matrices, i.e.:

A=[1 2 NAN;4 5 6;7 NAN 9] B=[NAN 2 3;NAN NAN 6;7 8 9] C=[NAN NAN NAN; 4 5 6;7 8 9]

Result:

(1,1) = nanmean(1 NAN NAN) (1,2) = nanmean(2 2 NAN) … (3,3) = nanmean(9 9 9)

Thank you!

Not sure if this is what you're asking but:

A=[1 2 NaN;4 5 6;7 NaN 9]; 
B=[NaN 2 3;NaN NaN 6;7 8 9]; 
C=[NaN NaN NaN; 4 5 6;7 8 9];
Z = cat(3,A,B,C);
nanmean(Z,3)

nanIdx = find( isnan(A) | isnan(B) | isnan(C) );
A(idx) = NaN; B(idx) = NaN; C(idx) = NaN

 B = B';
 B = B(~isnan(B))';
 C = C';
 C = C(~isnan(C))';