MATLAB Answers


check a null value

Asked by Amish
on 15 Apr 2013

I want to check in a cell array that at which position or which element is null or string how to do that for example i have array named att={'strong',[],'wind',[],'overcast','weak',[]}; now in this array i want to apply a if condition that if (att(x,y) contain null element) do this else ---. how to do that how to check null values and string values separately. i am using is empty but it always give either 1 or either 0. it is unable to recognize the null values in att variable.

  1 Comment

Jan Simon
on 15 Apr 2013

I do not see "null values" in you cell. Do you mean the empty matrices?

It would be helpful, if you post the code, instead of the vague explanation "I am using is empty". How could we guess what's going wrong without seeing any details? Please note that 0 and 1 are the expected answers for the isempty() command.


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1 Answer

Answer by Andrei Bobrov
on 15 Apr 2013
Edited by Andrei Bobrov
on 15 Apr 2013

t = cellfun('isempty',att);


a1 = att;
a1(t) = {0};


Jan Simon
on 15 Apr 2013

As usualy I mention, that cellfun('isempty', att) is more efficient.

OK, corrected.

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