Estimate length with out NaN's

Question

George 2015-3-11

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https://ww2.mathworks.cn/matlabcentral/answers/182607-estimate-length-with-out-nan-s

评论： Star Strider 2015-3-11

Hello

I use the length command to see the length of some of my variables, although they include NaN's inside by a previous script I used so as to fill them and compare them Is there a way to find the length of the data non-taking into account the NaN?

I tried nanlength , as you can use nanmean etc. although it does not like it

it gives me this error

Undefined function 'nanlength' for input arguments of type 'double'.

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Stephen23 2015-3-11

编辑：Stephen23 2015-3-11

Keep in mind that length does not give the number of elements in an array: for this you should use numel .

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Answer 1

Star Strider 2015-3-11

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https://ww2.mathworks.cn/matlabcentral/answers/182607-estimate-length-with-out-nan-s#answer_170903

在 MATLAB Online 中打开

This works:

nonan_len = length(x(~isnan(x)));

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George 2015-3-11

Thank you very much, just what I needed !

Star Strider 2015-3-11

My pleasure!

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Answer 2

Giorgos Papakonstantinou 2015-3-11

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/182607-estimate-length-with-out-nan-s#answer_170902

在 MATLAB Online 中打开

If x is your vector.

YourLength = length(x) - sum(isnan(x))

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