Removal of empty cells in an array

The variable: cumulat(1,2) is returning an empty third row. How does one not get that empty row? Please help.

clear;clc;close all

S = load('CCSD.mat');

F = fieldnames(S);

for n = 1:numel(F)

F1 = fieldnames(S.(F{n}));

F11{n} = F1;

for n1 = 1:numel(F1)

t = S.(F{n}).(F1{n1}).cc.t;

nn{n1,n} = F1{n1};

output{n1} = cumtrapz (t);

NF = @(p,q) max(output{n1}(t<=q)) - min(output{n1}(t>=p));

PArea{n1,n} = NF(5, 6);

end

cumulat{n} = [nn(:,n), PArea(:,n)];

end

Answer 1

[Karim]

this was due to the indexing, you were putting the temporary data into "nn{n1,n} = F1{n1}", thus at the second run of "n" a new column would be added to "nn" and it would result in the same number of rows as "n=1".

The solution is to allocate a new cell at each loop.

S = load('CCSD.mat');
F = fieldnames(S);

for n = 1:numel(F)
    F1 = fieldnames(S.(F{n}));
    F11{n} = F1;
    
    % allocate the variables
    nn = cell(numel(F1),1);
    PArea = cell(numel(F1),1);
    
    for n1 = 1:numel(F1)
        t = S.(F{n}).(F1{n1}).cc.t;
        nn{n1} = F1{n1};
        output{n1} = cumtrapz(t);
        NF = @(p,q) max(output{n1}(t<=q)) - min(output{n1}(t>=p));
        PArea{n1} = NF(5, 6);   
    end
    
    cumulat{n} = [nn, PArea];
end

cumulat

cumulat = 1×2 cell array
    {3×2 cell}    {2×2 cell}

cumulat{1,2}

ans = 2×2 cell array
    {'c1'}    {[5.5000]}
    {'c2'}    {[5.5000]}

[Josh]

Your reasoning is correct. Thanks for the help.