MATLAB: How to pull value of table for char array

MATLABtable

Hi there, I am new to tables (using 2019a) and I can't figure this bit out.
I have char arrays in a table:
t(1,'Domain')
ans =
  table
           Domain        
    _____________________
    {'www.wisebread.com'}
And I want to make a char array using a value from that table to input as a url in a webwrite();
When I use the code
    a = 'www.checkthing.com\thingcheck?domain='+t(1,'Domain')+'&secretkey=secretcode'
I get the error
    Undefined operator '+' for input arguments of type 'table'.
alternatively if I use strcat I get the error
    Inputs must be character vectors, cell arrays of character vectors, or string arrays.
I think this is supposed to be simple but I can't figure out how to use table values in normal operations 🙁

Best Answer

"When I use the code" 
t(1,'Domain')
then your indexing returns a table, because parentheses is used to return a table (i.e. usually a sub-table of the table you are indexing into). This is clearly explained in the documentation:
https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-table.html
Just like other container classes (e.g. cell array, string array), if you want to access the content of a table you need to use curly braces (not parentheses):
t{1,'Domain'}
"I think this is supposed to be simple..."
It is simple. For container classes table, cell arrays, and string arrays:
  • () refers to the container array itself.
  • {} refers to the contents of the array.
If you want part of the cell array, use parentheses. If you want whatever is in the cell array, use curly braces.
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