Find NaN elements in a matrix
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Hi Guys,
How can I find the exact location of NaN elements in a matrix. I work with really large arrays (size 1500*200).
How can I find which row has a NaN value in a column matrix or vice versa.?
Thanks
N
采纳的回答
Walter Roberson
2011-10-12
[row, col] = find(isnan(YourMatrix));
6 个评论
Wayne King
2011-10-12
@Walter Now, that's a better way :)
NS
2011-10-12
Jaspalsingh Virdi
2018-8-16
Thanks for a quick help even my data was too lARGE
Anirban Mandal
2020-3-19
thanks for providing an efficient solution
Ana Paulina García
2020-10-5
for me this actually creates a 1x0 variable named row and another one named col. None of the variables tells me the index :(
Whitney
2021-11-22
An empty result means that there are no NaNs in the martix
更多回答（3 个）
Wayne King
2011-10-12
One way:
X = ones(10,4);
X(3,4) = NaN;
indices = find(isnan(X) == 1);
[I,J] = ind2sub(size(X),indices);
Elizabeth Drybrugh
2018-5-3
编辑：Elizabeth Drybrugh
2018-5-3
Do this to get the sum
sum(isnan(x))
For other functions, it depends on what you actually need....
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