Modifying a cell array

Hello,

I have a cell array which is called hhh.

Elements of hhh could be:

hhh{1, 44} -> 'Rog'
hhh{1, 167}{1, 1} -> 'Rog'
hhh{1, 167}{1, 2} -> 'CvF'

I would like to turn entries that contain cells-within-cells, such as:

hhh{1, 167}{1, 1} -> 'Rog'

hhh{1, 167}{1, 2} -> 'CvF'

Into:

hhh{1, 167}-> 'Ro'
hhh{1, 168}-> 'CvF'

FYI:maximum nesting level is 2

How can I achieve these two goals? Thx in advance.

[Camille CAISSO]

Hi,

Clearly not the most efficient way to do it but it works :

clear all
close all

hhh{1, 1}{1, 1} ='a';
hhh{1, 2}{1, 1} ='b';
hhh{1, 2}{1, 2} ='c';
hhh{1, 3}{1, 1} ='d';
hhh{1, 3}{1, 2} ='e';
hhh{1, 3}{1, 3} ='f';
hhh{1, 4}{1, 1} ='g';

hhh_2 = {};

count = 0;
for i =1:size(hhh,2)
    A = size(hhh{i},2);
    if A>1
        for k=1:A
            hhh_2{1,count+k} = hhh{1,i}{1,k};
        end
    else
        hhh_2{1,count+1} = hhh{1,i};
    end
    count = count + A;
end

Yeah it's dirty, unefficient and slow.

Works on R2020a

Cheers,

Camille

Answer 1

[Voss]

If any cell array contained in a cell of hhh can only be a row vector, then:

hhh = {'a',{'b','c'},{'d','e','f'},{'g'}}

hhh = 1×4 cell array
    {'a'}    {1×2 cell}    {1×3 cell}    {1×1 cell}

idx = cellfun(@iscell,hhh);
hhh(~idx) = num2cell(hhh(~idx));
hhh = [hhh{:}]

hhh = 1×7 cell array
    {'a'}    {'b'}    {'c'}    {'d'}    {'e'}    {'f'}    {'g'}

If any cell array contained in a cell of hhh can be of arbitrary size, then:

hhh = {'a',{'b';'c'},{'d','e','f'},{'g'}}

hhh = 1×4 cell array
    {'a'}    {2×1 cell}    {1×3 cell}    {1×1 cell}

idx = cellfun(@iscell,hhh);
hhh(~idx) = num2cell(hhh(~idx));
hhh(idx) = cellfun(@(x)x(:),hhh(idx),'UniformOutput',false);
hhh = vertcat(hhh{:}).'

hhh = 1×7 cell array
    {'a'}    {'b'}    {'c'}    {'d'}    {'e'}    {'f'}    {'g'}