%% Add package to path (+function folder must be on path for import) 
addpath('your_import_path/matlab_padarray/package/');

%% Import functions
import padarray_pkg.* ;

>> a = [1,2,3];
>> padarray_pkg.padarray(a, 5)
ans =
 
     1     2     3     0     0

>> a = [1;2;3];
>> padarray_pkg.padarray(a, 5)

ans =

     1
     2
     3
     0
     0