find Nan in cell

I want to find nan element in A,

A={[],[],[31],[2,1]}; %first case
A1={[],[2],[3],[6]}% second case

I used this code, but did not give me the correct answer

P=cellfun(@(x) isnan(x),A,'UniformOutput',false);

after that, check if first and second elemnt is nan, put A as [];

aswer should be

A=[] % first case
A1={[],[2],[3],[6]}% second case

[KALYAN ACHARJYA]

Check here

[madhan ravi]

Provide an another example, as I understand A should contain [] as many [] are observed in A1 ? Is that true?

Answer 1

[KSSV]

Use isempty..not isnan

A={[],[],[31],[2,1]}; %first case
A1={[],[2],[3],[6]}% second case

P=cellfun(@(x) isempty(x),A,'UniformOutput',false)

[madhan ravi]

ismepty is a new function?

[KSSV]

Such function do not exist.

[NA]

A={[],[],[31],[2,1]};
P=cellfun(@(x) isempty(x),A,'UniformOutput',false);
if P{1}==1& P{2}==1
A=[];
end

is it a correct way to do this?