How to convert 'NaN' to numeric NaN

Question

Cordell Knighten 2021-4-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/792672-how-to-convert-nan-to-numeric-nan

评论： Cordell Knighten 2021-4-5

I have a 13x5 cell array which contains 4 'NaN' and I need to convert them from 'NaN'(string) to NaN(numeric). I have to use a nested loop as well the strcmp function but I don't know where to start.

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Answer 1

KALYAN ACHARJYA 2021-4-5

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/792672-how-to-convert-nan-to-numeric-nan#answer_667047

在 MATLAB Online 中打开

Is this?

>> str2num('NaN')
ans =
   NaN

Or

data={2,5,NaN,6}
cell2mat(data)

#

data =
  1×4 cell array
    {[2]}    {[5]}    {[NaN]}    {[6]}
ans =
     2     5   NaN     6

More: What is NaN (Matlab)?

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Cordell Knighten 2021-4-5

I tried both them earlier but it doesn't accept either of them. I provided a comment below to be concise. It wanted me to use the compare string function (strcmp) and a nested loop.

%Change the 'NaN' in the materialsData cell array to NaN using a nested

%loop. strcmp(s1,'NaN')can be used to find if s1 is 'NaN'.

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