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find maximum value of column when row is known and value of Array is non zero?

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Shubham Mohan Tatpalliwar
编辑： Shubham Mohan Tatpalliwar 2018-10-17
if true
% code
A = [51 2 3 nan;
4 5 6 7;
42 16 45 63;
NaN 2 56 12;
NaN 45 26 32];
how to code for max value of column for 1st row where A is not a NaN.

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采纳的回答

Jan
Jan 2018-10-17
编辑：Jan 2018-10-17
Maybe you want:
A = [51 2 3 nan;
4 5 6 7;
42 16 45 63;
NaN 2 56 12;
NaN 45 26 32];
index = find(~isnan(A(:, 1)), 1, 'last')
value = A(index, 1)
This replies the index and value of the bottommost non-NaN element in the first column of A.

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