updated getRow function to slice through last dimension of multidimensional columns

[cechava]

fixes #377

[cechava]

with initial commit, getRow method works with simple DynamicTable objects

sample snippet

col1 = types.hdmf_common.VectorData( ...
    'description', 'column #1', ...
    'data', (1:10)' ...
);
col2 = types.hdmf_common.VectorData( ...
    'description', 'column #2', ...
    'data', rand(5,2,10) ...
);
my_table = types.hdmf_common.DynamicTable( ...
    'description','an example table', ...
    'colnames', {'col1','col2'}, ...
    'col1',col1, ...
    'col2',col2, ...
    'id', types.hdmf_common.ElementIdentifiers('data', (0:9)') ...
);
>> my_table.getRow(1:3)

ans =

  3×2 table

    col1         col2     
    ____    ______________

     1      [1×5×2 double]
     2      [1×5×2 double]
     3      [1×5×2 double]

[bendichter]

Could we make the rows 5x2 instead of 1x5x2?

[cechava]

Could we make the rows 5x2 instead of 1x5x2?

it's not immediately clear how to do that. That output is handled under the hood by MATLAB after running the following line

subTable = table(row{:}, 'VariableNames', columns);

with the following variable values

K>> row

row =

  1×2 cell array

    {3×1 double}    {3×5×2 double} 
    
K>> columns

columns =

  1×2 cell array

    {'col1'}    {'col2'} 

[codecov]

Codecov Report

Merging #378 (f3a71e8) into master (d855b78) will increase coverage by 0.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #378      +/-   ##
==========================================
+ Coverage   84.91%   85.06%   +0.14%     
==========================================
  Files         124      124              
  Lines        4495     4539      +44     
==========================================
+ Hits         3817     3861      +44     
  Misses        678      678              

Impacted Files	Coverage Δ
+tests/+system/DynamicTableTest.m	88.14% <100.00%> (+2.16%)	⬆️
+types/+util/+dynamictable/getRow.m	97.64% <100.00%> (+0.46%)	⬆️

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[cechava]

@ln-vidrio @bendichter

Let me know if you have any thoughts on this PR.
I modified the DynamicTable tests to not use addRow because that hasn't been updated and generates tables with the wrong dimensions. We can easily add that back in once it has been updated.