Why is the length of these two variables are different?

I use the same number c to set the length of these two variables A (numerical) and B (string).

Why are their lengths are different at Station 3? Weird enough, if I only run Station 3, their length will be the same.

Here is my code and attached is the data.

clear all
close all
clc

%% --- load the file ---
load('test.mat'); % Sta

% Initialize each column:
ACCESSION = [];
CTDTEMP_ITS90_DEG_C = [];

for i=1:3 %length(Sta)
    
    c = length(Sta{i}.depth); % number of depths
    
    disp(['Number of depth levels:', num2str(c)]);
    
    % Accession:
    if isfield(Sta{i}, 'accession') == 1
        [ACCN{1:c}] = deal(Sta{i}.accession);
    else
        [ACCN{1:c}] = deal('N/A');
    end
    B = ACCN';
    ACCESSION = [ACCESSION; B];
    disp(['length Accession:', num2str(length(B))])
    

    %CTDTMP:
    A = [];
    if isfield(Sta{i}, 'ctdtmp') == 1
        A = Sta{i}.ctdtmp;
    else
        A = -999*ones(c,1)
    end
    CTDTEMP_ITS90_DEG_C = [CTDTEMP_ITS90_DEG_C; A];
    
    disp(['length of CTDTMP:', num2str(length(A))])
    
end

Answer 1

[Walter Roberson]

You do not truncate ACCN down to length c. ACCN had been 11 long because of the previous iterations; now only 10 are needed but you set ACCN{1:10} which does not remove the unneeded ACCN{11}

[Leon]

Exactly where the issue is. Many thanks!