How do I numeric convert array into string Array?

I am trying to make a tidy table to quanitfy segmented data from this:

I have extracted the information I want using this code:

%%Label items for quantification
mitLabel = bwlabel(Ibin,8)
%Display labeled Items
if true
    figure;
    subplot(1,2,1), imshow(I), title('Original');
    subplot(1,2,2), imshow(label2rgb(mitLabel, 'jet', [.7 .7 .7], 'shuffle')), title('Labeled RGB');
end
%Set parameter
mitStats = regionprops(mitLabel, 'Area', 'Perimeter', 'MajorAxisLength', 'MinorAxisLength')
%Extract arrays for area, perimeter, major axis length and minor axis length for each element in binary image
mitArea = [mitStats.Area];
mitPerimeter = [mitStats.Perimeter];
mitMaxL = [mitStats.MajorAxisLength];

I am planning on presenting this data as following:

           Area  Perimeter  etc.

      M1  C1  4       5    
      M2  C1  10      200
      M3  C2  40      40
      M4  C2
      M5  C3    etc
      M6  C4
      Mn  Cn

Mn Specifies mitochondria number, while Cn specifies which cell the mitochondria is confined in I am making this system because its easier to handle later when I am examining the data (Tidy Data?)

I however need a way for the computer to assign each struct(mitchondria) in the array a number (Mn), but also each cell which is being examined a number. The problem is that every cell contains and unknown number of mitochondrion, so how do I make the Matlab assign each mitochondrion a new variable in the table?

[dpb]

Probably attaching a .mat file with a sample dataset would be easiest for someone else to to work with to try to understand the actual data arrangement...

Storing data as incomplete tables isn't really feasible; you could have a structure array or cell array or maybe even flatten the structure to a table might be the simplest way to organize.