cell array in cell array

a=cell(10,1);
for n=1:10
    a{n}=cell(3,1);
    a{n}{1}=datestr( now() );
    a{n}{2}=now();
    a{n}{3}=n;
end

% OK

a{1}
    {'06-Apr-2021 19:02:25'}
    {[          7.3825e+05]}
    {[                   1]}

% OK

a{1}{1}
    '06-Apr-2021 19:02:25'

% I would like to obtain by

b = a{1:10}{3}
1,2,,,,,,10  % array

Answer 1

[Stephen23]

If you really want to use inconvenient nested cell arrays, this will work with your example data:

b = [a{:}];
b = [b{3,:}]

b = 1×10

1 2 3 4 5 6 7 8 9 10

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

Note that using just one cell array (no nested cell arrays) makes this task simpler:

a = cell(10,3);
for n = 1:10
    a{n,1} = datestr( now() );
    a{n,2} = now();
    a{n,3} = n;
end
a{1,1}

ans = '06-Apr-2021 10:59:13'

a{1,2}

ans = 7.3825e+05

b = [a{:,3}]

b = 1×10

1 2 3 4 5 6 7 8 9 10

[Takahiro]

Thanks a lot!

Your answer is what I wanted, since cell array a "inconvinient nested cell array" is given by another code.

The code you indicated worked well as I imaged.

In addition, It was good opetunity to learn about "comma-separated lists".

Answer 2

[KSSV]

n = length(a) ;
iwant = zeros(n,1) ; 
for i = 1:n
   iwant(i) = a{i}{3} ; 
end

[Takahiro]

Thanks.

But this case, a is given.