Problem 2836. Modify subscripts - easier

Created by Jan Orwat

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MATLAB supports object-oriented programming. Let's take an advantage of it in cody.This problem focus on modifying subscripted references for class double.This example shows classical behavior:<pre class="language-matlab">&gt;&gt; A = [1 4 7
 2 5 8
 3 6 9];
&gt;&gt; A([1 3], [3 1])
</pre><pre class="language-matlab">ans =
</pre><pre> 7 1
 9 3</pre>While this is what I am looking for:<pre class="language-matlab">&gt;&gt; modified_A = sub_double(A);
&gt;&gt; modified_A([1 3], [3 1])
</pre><pre class="language-matlab">ans = 
</pre><pre> 7 3</pre><pre class="language-matlab">&gt;&gt; modified_A([1 2 2], [3 1 2])
</pre><pre class="language-matlab">ans = 
</pre><pre> 7 2 5</pre>If there are given two subscripts vectors of the same lenght, return only those values which correspond to paired subscriptions.Task: You are given class template. Complete it to achieve desired behaviour.Additional info:<ul><li>If you are not familiar with classes in MATLAB you can find more information <a href = "http://www.mathworks.com/help/matlab/matlab_oop/class-definition.html">here</a> and <a href = "http://www.mathworks.com/help/matlab/customize-matlab-behavior.html">here</a> or you can find it typing:</li></ul><pre> &gt;&gt; doc 'Class Definition'
 &gt;&gt; doc 'Customize MATLAB Behavior'</pre><ul><li>Feel free to modify the template,</li><li>You can try your skills to write a function instead of a class. You can use anonymus functions, etc.,</li><li>Using classes open another doors to cheat (easily). This is not a hacking problem, so please respect it (you can create some new, interesting problems :-) ),</li><li>In this form it is solvable without using function "builtin" which is forbidden in cody. I can allow it in the testsuite if there will be need for it,</li><li>Look for more problems using tags below</li></ul>Enjoy!

MATLAB supports object-oriented programming. Let's take an advantage of it in cody.

This problem focus on modifying subscripted references for class double.

This example shows classical behavior:

>> A = [1 4 7
          2 5 8
          3 6 9];
  >> A([1 3], [3 1])

ans =

7     1
     9     3

While this is what I am looking for:

>> modified_A = sub_double(A);
  >> modified_A([1 3], [3 1])
  
  ans = 
  
     7     3

>> modified_A([1 2 2], [3 1 2])
  
  ans = 
  
     7     2     5

If there are given two subscripts vectors of the same lenght, return only those values which correspond to paired subscriptions.

*Task*: You are given class template. Complete it to achieve desired behaviour.

Additional info:

* If you are not familiar with classes in MATLAB you can find more information <http://www.mathworks.com/help/matlab/matlab_oop/class-definition.html here> and <http://www.mathworks.com/help/matlab/customize-matlab-behavior.html here> or you can find it typing:

>> doc 'Class Definition'
    >> doc 'Customize MATLAB Behavior'
    
    
* Feel free to modify the template,
* You can try your skills to write a function instead of a class. You can use anonymus functions, etc.,
* Using classes open another doors to cheat (easily).  This is not a hacking problem, so please respect it (you can create some new, interesting problems :-) ),
* In this form it is solvable without using function "builtin" which is forbidden in cody. I can allow it in the testsuite if there will be need for it,
* Look for more problems using tags below

Enjoy!

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18 Solutions
9 Solvers

Last Solution submitted on Apr 23, 2021

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Andrew Newell on 9 May 2017

Are they still allowing classes? My solution passed all the tests on my computer.

Andrew Newell on 9 May 2017

However, when I ran it on Cody, I got "Something went wrong. Please check your code for errors and try again later."

Jan Orwat on 10 May 2017

Hi Andrew, I will check it out.

Andrew Newell on 17 May 2017

Whatever the problem is, it went away.

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