How to display a full table when it's a class property

Hi,

Suppose I have a class which has a table as a parameter, like this...

classdef exampleClass1 < handle
    
   properties
      T = table; 
   end
   
   methods
   % Constructor
   function obj = exampleClass1()
       
       sz = [3 3];
       varTypes = {'double','double','double'};
       varNames = {'Min','Value','Max'};
       obj.T = table('Size',sz,'VariableTypes',varTypes,'VariableNames',varNames);
       obj.T(1,:) = {1 2 3 };
   end
    
   end
end

Then this class is a subclass of a second one, like so....

classdef exampleClass < exampleClass1
    
   properties
       myParameter1
       myParameter2
   end
    
    
end

When I make an instance of exampleClass, it gets displayed like this....

>> myInstance = exampleClass

myInstance = 

  exampleClass with properties:

    myParameter1: []
    myParameter2: []
               T: [3×3 table]

But actually this is not how I want the class to display. Actually I would like it to show the full expanded view of the table as default e.g.

>> myInstance.T

ans =

  3×3 table

    Min    Value    Max
    ___    _____    ___

     1       2       3 
     0       0       0 
     0       0       0 

How can I make it so that the expanded version of the table is displayed by default (along with the other properties) when i display 'exampleClass'. I know this is probably something to do with 'matlab.mixin.CustomDisplay', but I can't quite figure out what.

Cheers,

Arwel

Answer 1

[Aakash Mehta]

By overloading the disp method for your class you can customize how properties are displayed.

In exampleClass1, Use the matlab.mixin.SetGet class to derive classes that inherit a set and get method interface.

classdef exampleClass1 < matlab.mixin.SetGet

properties
T = table;
end

methods
% Constructor
function obj = exampleClass1()

sz = [3 3];
varTypes = {'double','double','double'};
varNames = {'Min','Value','Max'};
obj.T = table('Size',sz,'VariableTypes',varTypes,'VariableNames',varNames);
obj.T(1,:) = {1 2 3 };
end
end
end

Overload the disp method in exampleClass.

classdef exampleClass < exampleClass1

properties
myParameter1
myParameter2
end
methods
function disp(obj)
    p=properties(obj);
    for i=1:length(p)
        propval=get(obj,p);
        disp(p{i}) 
        disp(propval{1,i})
    end
end
end
end

Now when you make an instance of exampleClass, it gets displayed like this

>> myInstance = exampleClass

myInstance = 

myParameter1
myParameter2
T
    Min    Value    Max
    ___    _____    ___

     1       2       3 
     0       0       0 
     0       0       0 
     

Change the disp method as per your expected output.

For more details of overloading the disp method, refer to the following link.

http://www.mathworks.com/help/matlab/matlab_oop/displaying-objects-in-the-command-window.html