Extract first non-NaN of each row without loop
7 views (last 30 days)
Show older comments
Hello, from a matrix where each row contains at least one non-NaN, is there away to extract the FIRST non-nan of each row without using a loop?
A=[NaN,444,NaN,NaN,41;
NaN,NaN,NaN,222,NaN;
NaN,NaN,554,554,NaN;
125,747,21,NaN,4;
NaN,NaN,NaN,43,NaN;
NaN,98,NaN,75,NaN;
NaN,22,NaN,NaN,NaN]
From matrix A, I would like to arrive to B
B=[444;222;554;125;43;98;22]
Thanks
Accepted Answer
Walter Roberson
on 24 Oct 2021
A=[NaN,444,NaN,NaN,41;
NaN,NaN,NaN,222,NaN;
NaN,NaN,554,554,NaN;
125,747,21,NaN,4;
NaN,NaN,NaN,43,NaN;
NaN,98,NaN,75,NaN;
NaN,22,NaN,NaN,NaN]
B = A(sub2ind(size(A), (1:size(A,1)).', sum(cumprod(isnan(A),2),2)+1))
More Answers (0)
See Also
Categories
Find more on NaNs in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!