find the cell nan or not

Question

回答： Walter Roberson 2015-8-24

I am trying to check the cell is nan or not I have a cell array a = {'ddd_Dds_1_dffs'}

when i use like this cellfun(@isnan,a,'UniformOutput',false)

i am getting as [0 0 0 0 0.......]

How to use cell fun to get only logical 1 or 0, if it is nan then 1 or 0

Thank you

Answer 1

Walter Roberson 2015-8-24

cellfun(@(C) isnumeric(C) && any(isnan(C(:))), a)

for the case where you want to check whether the entry contains NaN anywhere. If you want to check to see whether the entry is a single NaN then

cellfun(@(C) isequaln(C, NaN), a)

You are getting the vector of results because strings are arrays of char and isnan() was testing each element of the array

In the situation where you know that each entry is either a string or else a NaN, then test

~cellfun(@ischar, a)