Extract only some specific elements of the arrays of a cell

I have a cell, say C, where each array is also a cell. I have an index set and I want to extract cells 2, 5,1. It can be done by using . But it returns a cell where each cell is still a cell. What I want to know is how I can extract a new cell that contains cells 2,5, and 1 of the original cell, and also for each individual cell, it only contains cells 2,5, and 1. Therefore, the final cell is a cell and all individual cells are also a cell.

Answer 1

[Stephen23]

C = arrayfun(@(n)num2cell(rand(1,5)),1:5,'uni',0)

C = 1×5 cell array
    {1×5 cell}    {1×5 cell}    {1×5 cell}    {1×5 cell}    {1×5 cell}

C{:}

ans = 1×5 cell array
    {[0.0326]}    {[0.4440]}    {[0.0083]}    {[0.6590]}    {[0.0110]}

ans = 1×5 cell array
    {[0.2557]}    {[0.8965]}    {[0.0137]}    {[0.0078]}    {[0.5929]}

ans = 1×5 cell array
    {[0.4589]}    {[0.6418]}    {[0.2742]}    {[0.3274]}    {[0.1927]}

ans = 1×5 cell array
    {[0.9374]}    {[0.0589]}    {[0.0613]}    {[0.5019]}    {[0.8903]}

ans = 1×5 cell array
    {[0.6602]}    {[0.0461]}    {[0.6398]}    {[0.9363]}    {[0.9559]}

X = [2,5,1];
D = cellfun(@(d)d(X),C(X),'uni',0)

D = 1×3 cell array
    {1×3 cell}    {1×3 cell}    {1×3 cell}

D{:}

ans = 1×3 cell array
    {[0.8965]}    {[0.5929]}    {[0.2557]}

ans = 1×3 cell array
    {[0.0461]}    {[0.9559]}    {[0.6602]}

ans = 1×3 cell array
    {[0.4440]}    {[0.0110]}    {[0.0326]}

[Hamed Jalali]

Thanks for this smart solution.

Answer 2

[KSSV]

C = cell(5,1) ; 
for i = 1:5
    C{i} = rand(1,3) ; 
end
idx = [2 5 1] ; 
iwant = C(idx)

iwant = 3×1 cell array
    {[0.2284 0.3773 0.9742]}
    {[0.5814 0.1525 0.4597]}
    {[0.9464 0.0561 0.6506]}

[Hamed Jalali]

Each element of C is also a cell. If you cahnge C{i} = rand(1,3) ; to C{i} = rand(1,5) ; your final cell, iwant is a cell which each element is still double. I need all elements of the final cell be a cell/double.