- () refers to the container array itself.
 - {} refers to the contents of the array.
 
How to pull value of table for char array?
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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 :(
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采纳的回答
  Stephen23
      
      
 2020-5-21
        
      编辑:Stephen23
      
      
 2020-5-21
  
      "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:
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:
If you want part of the cell array, use parentheses. If you want whatever is in the cell array, use curly braces.
更多回答(1 个)
  Mehmed Saad
      
 2020-5-21
        
      编辑:Mehmed Saad
      
 2020-5-21
  
      Because t(1,'Domain') is of type table. You need to convert that table output to string or cell. To do that type on Command window
t.Domain(1)
ans =
  1×1 cell array
    {'www.wisebread.com'}
So basically we extracted the data from table
Now do that strcat step
    a = strcat('www.checkthing.com\thingcheck?domain=',t.Domain(1),'&secretkey=secretcode')
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