Can you save and append to a variable that is a vector in a matfile

Can you save a variable that is a vector to a matfile or can you only save symmetrical arrays? If you can save a vector can you then append to the end of the variable in the matfile I have tried:

var = [1,2,3,4,5]

var = 1×5

1 2 3 4 5

matFileObj = matfile('myFile.mat', 'Writable', true);
matFileObj.var = var;
if ~isempty(who(matFileObj, 'var'))
    varSize = size(matFileObj, 'var', 2);
    matFileObj.var(varSize+1,:)  = var;
end

this code builds an array that is 5 x 5 instead of 1 x 5 and then appends to the bottom of the rows in the file)

%    |    1    2    3    4    5    |
%    |    0    0    0    0    0    |
%    |    0    0    0    0    0    |
%    |    0    0    0    0    0    |
%    |    0    0    0    0    0    |
%    |    0    0    0    0    0    |
%    |    1    2    3    4    5    |

But I want:

%    |    1    2    3    4    5   1    2    3    4    5 |
% **********************************************************

Answer 1

[Matt J]

if ~isempty(who(matFileObj, 'var'))
    matFileObj.var  = [matFileObj.var ,var];
end

or,

if ~isempty(who(matFileObj, 'var'))
    varSize = size(matFileObj, 'var', 2);
    matFileObj.var(1,varSize+(1:numel(var)))  = var;
end