Area of a 2D convex hull Announcing the arrival of Valued Associate #679: Cesar Manara ...

Is above average number of years spent on PhD considered a red flag in future academia or industry positions?

How to say that you spent the night with someone, you were only sleeping and nothing else?

The following signatures were invalid: EXPKEYSIG 1397BC53640DB551

Writing Thesis: Copying from published papers

Mortgage adviser recommends a longer term than necessary combined with overpayments

Geometric mean and geometric standard deviation

New Order #5: where Fibonacci and Beatty meet at Wythoff

I'm having difficulty getting my players to do stuff in a sandbox campaign

How to politely respond to generic emails requesting a PhD/job in my lab? Without wasting too much time

What computer would be fastest for Mathematica Home Edition?

Do we know why communications with Beresheet and NASA were lost during the attempted landing of the Moon lander?

How do you clear the ApexPages.getMessages() collection in a test?

What did Darwin mean by 'squib' here?

Unexpected result with right shift after bitwise negation

Strange behaviour of Check

Stars Make Stars

I'm thinking of a number

If I can make up priors, why can't I make up posteriors?

What is the largest species of polychaete?

Stop battery usage [Ubuntu 18]

How to colour the US map with Yellow, Green, Red and Blue to minimize the number of states with the colour of Green

What items from the Roman-age tech-level could be used to deter all creatures from entering a small area?

Do working physicists consider Newtonian mechanics to be "falsified"?

Cold is to Refrigerator as warm is to?



Area of a 2D convex hull



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
The PPCG Site design is on its way - help us make it awesome!
Sandbox for Proposed ChallengesWhat is the area of this polygon?Find the Convex Hull of a set of 2D pointsFind the area of the largest convex polygonPoint in convex hull (2D)The happy Ender problemDoes the triangle contain the origin?What is the area of this polygon?Sort the points by linear distance in a 3D spaceElliptic systemMaximum Area of a Polygon with Vertices of a PolygonCircle intersection area












1












$begingroup$


You are given an array/list/vector of pairs of integers representing cartesian coordinates (x, y) of points on a 2D Euclidean plane; all coordinates are between −104 and 104, duplicates are allowed. Find the area of the convex hull of those points, rounded to the nearest integer; an exact midpoint should be rounded to the closest even integer. You may use floating-point numbers in intermediate computations, but only if you can guarantee that the final result will be always correct. This is a code-golf, the shortest correct program (ignoring non-significant whitespace, newlines and comments) wins.



Some test cases:



Input: [[50, -13]]

Result: 0



Input: [[-25, -26], [34, -27]]

Result: 0



Input: [[-6, -14], [-48, -45], [21, 25]]

Result: 400



Input: [[4, 30], [5, 37], [-18, 49], [-9, -2]]

Result: 562



Input: [[0, 16], [24, 18], [-43, 36], [39, -29], [3, -38]]

Result: 2978



Input: [[19, -19], [15, 5], [-16, -41], [6, -25], [-42, 1], [12, 19]]

Result: 2118



Input: [[-23, 13], [-13, 13], [-6, -7], [22, 41], [-26, 50], [12, -12], [-23, -7]]

Result: 2307



Input: [[31, -19], [-41, -41], [25, 34], [29, -1], [42, -42], [-34, 32], [19, 33], [40, 39]]

Result: 6037



Input: [[47, 1], [-22, 24], [36, 38], [-17, 4], [41, -3], [-13, 15], [-36, -40], [-13, 35], [-25, 22]]

Result: 3908



Input: [[29, -19], [18, 9], [30, -46], [15, 20], [24, -4], [5, 19], [-44, 4], [-20, -8], [-16, 34], [17, -36]]

Result: 2905





code-golf number geometry integer







share|improve this question











$endgroup$








  • 2




    $begingroup$
    Do you have any test cases?
    $endgroup$
    – Maltysen
    3 hours ago






  • 5




    $begingroup$
    Not counting whitespace in code golf is a bad idea, it leads to submissions with massive strings of whitespace plus generic code to convert the string to code and execute it.
    $endgroup$
    – xnor
    2 hours ago








  • 1




    $begingroup$
    So if someone can just make a whitespace solution...
    $endgroup$
    – attinat
    1 hour ago










  • $begingroup$
    Related
    $endgroup$
    – Giuseppe
    18 mins ago
















1












$begingroup$


You are given an array/list/vector of pairs of integers representing cartesian coordinates (x, y) of points on a 2D Euclidean plane; all coordinates are between −104 and 104, duplicates are allowed. Find the area of the convex hull of those points, rounded to the nearest integer; an exact midpoint should be rounded to the closest even integer. You may use floating-point numbers in intermediate computations, but only if you can guarantee that the final result will be always correct. This is a code-golf, the shortest correct program (ignoring non-significant whitespace, newlines and comments) wins.



Some test cases:



Input: [[50, -13]]

Result: 0



Input: [[-25, -26], [34, -27]]

Result: 0



Input: [[-6, -14], [-48, -45], [21, 25]]

Result: 400



Input: [[4, 30], [5, 37], [-18, 49], [-9, -2]]

Result: 562



Input: [[0, 16], [24, 18], [-43, 36], [39, -29], [3, -38]]

Result: 2978



Input: [[19, -19], [15, 5], [-16, -41], [6, -25], [-42, 1], [12, 19]]

Result: 2118



Input: [[-23, 13], [-13, 13], [-6, -7], [22, 41], [-26, 50], [12, -12], [-23, -7]]

Result: 2307



Input: [[31, -19], [-41, -41], [25, 34], [29, -1], [42, -42], [-34, 32], [19, 33], [40, 39]]

Result: 6037



Input: [[47, 1], [-22, 24], [36, 38], [-17, 4], [41, -3], [-13, 15], [-36, -40], [-13, 35], [-25, 22]]

Result: 3908



Input: [[29, -19], [18, 9], [30, -46], [15, 20], [24, -4], [5, 19], [-44, 4], [-20, -8], [-16, 34], [17, -36]]

Result: 2905





code-golf number geometry integer







share|improve this question











$endgroup$








  • 2




    $begingroup$
    Do you have any test cases?
    $endgroup$
    – Maltysen
    3 hours ago






  • 5




    $begingroup$
    Not counting whitespace in code golf is a bad idea, it leads to submissions with massive strings of whitespace plus generic code to convert the string to code and execute it.
    $endgroup$
    – xnor
    2 hours ago








  • 1




    $begingroup$
    So if someone can just make a whitespace solution...
    $endgroup$
    – attinat
    1 hour ago










  • $begingroup$
    Related
    $endgroup$
    – Giuseppe
    18 mins ago














1












1








1





$begingroup$


You are given an array/list/vector of pairs of integers representing cartesian coordinates (x, y) of points on a 2D Euclidean plane; all coordinates are between −104 and 104, duplicates are allowed. Find the area of the convex hull of those points, rounded to the nearest integer; an exact midpoint should be rounded to the closest even integer. You may use floating-point numbers in intermediate computations, but only if you can guarantee that the final result will be always correct. This is a code-golf, the shortest correct program (ignoring non-significant whitespace, newlines and comments) wins.



Some test cases:



Input: [[50, -13]]

Result: 0



Input: [[-25, -26], [34, -27]]

Result: 0



Input: [[-6, -14], [-48, -45], [21, 25]]

Result: 400



Input: [[4, 30], [5, 37], [-18, 49], [-9, -2]]

Result: 562



Input: [[0, 16], [24, 18], [-43, 36], [39, -29], [3, -38]]

Result: 2978



Input: [[19, -19], [15, 5], [-16, -41], [6, -25], [-42, 1], [12, 19]]

Result: 2118



Input: [[-23, 13], [-13, 13], [-6, -7], [22, 41], [-26, 50], [12, -12], [-23, -7]]

Result: 2307



Input: [[31, -19], [-41, -41], [25, 34], [29, -1], [42, -42], [-34, 32], [19, 33], [40, 39]]

Result: 6037



Input: [[47, 1], [-22, 24], [36, 38], [-17, 4], [41, -3], [-13, 15], [-36, -40], [-13, 35], [-25, 22]]

Result: 3908



Input: [[29, -19], [18, 9], [30, -46], [15, 20], [24, -4], [5, 19], [-44, 4], [-20, -8], [-16, 34], [17, -36]]

Result: 2905





code-golf number geometry integer







share|improve this question











$endgroup$




You are given an array/list/vector of pairs of integers representing cartesian coordinates (x, y) of points on a 2D Euclidean plane; all coordinates are between −104 and 104, duplicates are allowed. Find the area of the convex hull of those points, rounded to the nearest integer; an exact midpoint should be rounded to the closest even integer. You may use floating-point numbers in intermediate computations, but only if you can guarantee that the final result will be always correct. This is a code-golf, the shortest correct program (ignoring non-significant whitespace, newlines and comments) wins.



Some test cases:



Input: [[50, -13]]

Result: 0



Input: [[-25, -26], [34, -27]]

Result: 0



Input: [[-6, -14], [-48, -45], [21, 25]]

Result: 400



Input: [[4, 30], [5, 37], [-18, 49], [-9, -2]]

Result: 562



Input: [[0, 16], [24, 18], [-43, 36], [39, -29], [3, -38]]

Result: 2978



Input: [[19, -19], [15, 5], [-16, -41], [6, -25], [-42, 1], [12, 19]]

Result: 2118



Input: [[-23, 13], [-13, 13], [-6, -7], [22, 41], [-26, 50], [12, -12], [-23, -7]]

Result: 2307



Input: [[31, -19], [-41, -41], [25, 34], [29, -1], [42, -42], [-34, 32], [19, 33], [40, 39]]

Result: 6037



Input: [[47, 1], [-22, 24], [36, 38], [-17, 4], [41, -3], [-13, 15], [-36, -40], [-13, 35], [-25, 22]]

Result: 3908



Input: [[29, -19], [18, 9], [30, -46], [15, 20], [24, -4], [5, 19], [-44, 4], [-20, -8], [-16, 34], [17, -36]]

Result: 2905





code-golf number geometry integer




code-golf number geometry integer






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 2 hours ago







Vladimir Reshetnikov

















asked 3 hours ago









Vladimir ReshetnikovVladimir Reshetnikov

1,9781613




1,9781613








  • 2




    $begingroup$
    Do you have any test cases?
    $endgroup$
    – Maltysen
    3 hours ago






  • 5




    $begingroup$
    Not counting whitespace in code golf is a bad idea, it leads to submissions with massive strings of whitespace plus generic code to convert the string to code and execute it.
    $endgroup$
    – xnor
    2 hours ago








  • 1




    $begingroup$
    So if someone can just make a whitespace solution...
    $endgroup$
    – attinat
    1 hour ago










  • $begingroup$
    Related
    $endgroup$
    – Giuseppe
    18 mins ago














  • 2




    $begingroup$
    Do you have any test cases?
    $endgroup$
    – Maltysen
    3 hours ago






  • 5




    $begingroup$
    Not counting whitespace in code golf is a bad idea, it leads to submissions with massive strings of whitespace plus generic code to convert the string to code and execute it.
    $endgroup$
    – xnor
    2 hours ago








  • 1




    $begingroup$
    So if someone can just make a whitespace solution...
    $endgroup$
    – attinat
    1 hour ago










  • $begingroup$
    Related
    $endgroup$
    – Giuseppe
    18 mins ago








2




2




$begingroup$
Do you have any test cases?
$endgroup$
– Maltysen
3 hours ago




$begingroup$
Do you have any test cases?
$endgroup$
– Maltysen
3 hours ago




5




5




$begingroup$
Not counting whitespace in code golf is a bad idea, it leads to submissions with massive strings of whitespace plus generic code to convert the string to code and execute it.
$endgroup$
– xnor
2 hours ago






$begingroup$
Not counting whitespace in code golf is a bad idea, it leads to submissions with massive strings of whitespace plus generic code to convert the string to code and execute it.
$endgroup$
– xnor
2 hours ago






1




1




$begingroup$
So if someone can just make a whitespace solution...
$endgroup$
– attinat
1 hour ago




$begingroup$
So if someone can just make a whitespace solution...
$endgroup$
– attinat
1 hour ago












$begingroup$
Related
$endgroup$
– Giuseppe
18 mins ago




$begingroup$
Related
$endgroup$
– Giuseppe
18 mins ago










2 Answers
2






active

oldest

votes


















3












$begingroup$

SQL Server 2012+, 84 bytes



SELECT Round(Geometry::ConvexHullAggregate(Geometry::Point(x,y,0)).STArea(),0)FROM A


Makes use of the geometry functions and aggregates in SQL Server.
Coordindates are from table A with columns x and y.






share|improve this answer









$endgroup$





















    0












    $begingroup$


    Wolfram Language (Mathematica), 27 bytes



    Round@*Area@*ConvexHullMesh


    Try it online!






    share|improve this answer









    $endgroup$














      Your Answer






      StackExchange.ifUsing("editor", function () {
      StackExchange.using("externalEditor", function () {
      StackExchange.using("snippets", function () {
      StackExchange.snippets.init();
      });
      });
      }, "code-snippets");

      StackExchange.ready(function() {
      var channelOptions = {
      tags: "".split(" "),
      id: "200"
      };
      initTagRenderer("".split(" "), "".split(" "), channelOptions);

      StackExchange.using("externalEditor", function() {
      // Have to fire editor after snippets, if snippets enabled
      if (StackExchange.settings.snippets.snippetsEnabled) {
      StackExchange.using("snippets", function() {
      createEditor();
      });
      }
      else {
      createEditor();
      }
      });

      function createEditor() {
      StackExchange.prepareEditor({
      heartbeatType: 'answer',
      autoActivateHeartbeat: false,
      convertImagesToLinks: false,
      noModals: true,
      showLowRepImageUploadWarning: true,
      reputationToPostImages: null,
      bindNavPrevention: true,
      postfix: "",
      imageUploader: {
      brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
      contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
      allowUrls: true
      },
      onDemand: true,
      discardSelector: ".discard-answer"
      ,immediatelyShowMarkdownHelp:true
      });


      }
      });














      draft saved

      draft discarded


















      StackExchange.ready(
      function () {
      StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodegolf.stackexchange.com%2fquestions%2f183191%2farea-of-a-2d-convex-hull%23new-answer', 'question_page');
      }
      );

      Post as a guest















      Required, but never shown

























      2 Answers
      2






      active

      oldest

      votes








      2 Answers
      2






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      3












      $begingroup$

      SQL Server 2012+, 84 bytes



      SELECT Round(Geometry::ConvexHullAggregate(Geometry::Point(x,y,0)).STArea(),0)FROM A


      Makes use of the geometry functions and aggregates in SQL Server.
      Coordindates are from table A with columns x and y.






      share|improve this answer









      $endgroup$


















        3












        $begingroup$

        SQL Server 2012+, 84 bytes



        SELECT Round(Geometry::ConvexHullAggregate(Geometry::Point(x,y,0)).STArea(),0)FROM A


        Makes use of the geometry functions and aggregates in SQL Server.
        Coordindates are from table A with columns x and y.






        share|improve this answer









        $endgroup$
















          3












          3








          3





          $begingroup$

          SQL Server 2012+, 84 bytes



          SELECT Round(Geometry::ConvexHullAggregate(Geometry::Point(x,y,0)).STArea(),0)FROM A


          Makes use of the geometry functions and aggregates in SQL Server.
          Coordindates are from table A with columns x and y.






          share|improve this answer









          $endgroup$



          SQL Server 2012+, 84 bytes



          SELECT Round(Geometry::ConvexHullAggregate(Geometry::Point(x,y,0)).STArea(),0)FROM A


          Makes use of the geometry functions and aggregates in SQL Server.
          Coordindates are from table A with columns x and y.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 2 hours ago









          MickyTMickyT

          10.4k21637




          10.4k21637























              0












              $begingroup$


              Wolfram Language (Mathematica), 27 bytes



              Round@*Area@*ConvexHullMesh


              Try it online!






              share|improve this answer









              $endgroup$


















                0












                $begingroup$


                Wolfram Language (Mathematica), 27 bytes



                Round@*Area@*ConvexHullMesh


                Try it online!






                share|improve this answer









                $endgroup$
















                  0












                  0








                  0





                  $begingroup$


                  Wolfram Language (Mathematica), 27 bytes



                  Round@*Area@*ConvexHullMesh


                  Try it online!






                  share|improve this answer









                  $endgroup$




                  Wolfram Language (Mathematica), 27 bytes



                  Round@*Area@*ConvexHullMesh


                  Try it online!







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 1 hour ago









                  attinatattinat

                  4897




                  4897






























                      draft saved

                      draft discarded




















































                      If this is an answer to a challenge…




                      • …Be sure to follow the challenge specification. However, please refrain from exploiting obvious loopholes. Answers abusing any of the standard loopholes are considered invalid. If you think a specification is unclear or underspecified, comment on the question instead.


                      • …Try to optimize your score. For instance, answers to code-golf challenges should attempt to be as short as possible. You can always include a readable version of the code in addition to the competitive one.
                        Explanations of your answer make it more interesting to read and are very much encouraged.


                      • …Include a short header which indicates the language(s) of your code and its score, as defined by the challenge.



                      More generally…




                      • …Please make sure to answer the question and provide sufficient detail.


                      • …Avoid asking for help, clarification or responding to other answers (use comments instead).





                      draft saved


                      draft discarded














                      StackExchange.ready(
                      function () {
                      StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodegolf.stackexchange.com%2fquestions%2f183191%2farea-of-a-2d-convex-hull%23new-answer', 'question_page');
                      }
                      );

                      Post as a guest















                      Required, but never shown





















































                      Required, but never shown














                      Required, but never shown












                      Required, but never shown







                      Required, but never shown

































                      Required, but never shown














                      Required, but never shown












                      Required, but never shown







                      Required, but never shown







                      -

                      Popular posts from this blog

                      As a Security Precaution, the user account has been locked The Next CEO of Stack OverflowMS...

                      Image
                      Could a dragon use its wings to swim? Is it a bad idea to plug the other end of ESD strap to wall ground? How can I prove that a state of equilibrium is unstable? Compilation of a 2d array and a 1d array pgfplots: How to draw a tangent graph below two others? How dangerous is XSS Gauss' Posthumous Publications? How to implement Comparable so it is consistent with identity-equality What does this strange code stamp on my passport mean? "Eavesdropping" vs "Listen in on" Which acid/base does a strong base/acid react when added to a buffer solution?
                      Read more

                      Список ссавців Італії Природоохоронні статуси | Список |...

                      Image
                      Списки ссавцівФауна ІталіїСписки:ІталіяСсавці Італії ІталіїМСОПХижіCetartiodactylaРукокриліКомахоїдніЗайцеподібніГризуниМСОП ссавці Італії ? Італія Біорегіон Біогеографічний екорегіон Голарктика Екозона Палеарктика Біом субтропічний ліс, альпійські луки, прісні води, континентальний шельф, континентальний схил Місцевість Континент Європа Країна Італія Територія Середземне море Фауна більшого обсягу За географією фауна Європи За систематикою ссавці, фауна Італії За екологією суходільна фауна, морська фауна За біогеографією теріофауна Європи Геологічний вік сучасність Особливості Видовий обсяг 121 Чужорідні види Genetta genetta, Ondatra zibethicus, Oryctolagus cuniculus, Rattus norvegicus, Rattus rattus, Sciurus carolinensis, Tamias sibiricus Список ссавців Італії містить перелік видів, записаних на території Італії (південна Європа) згідно з
                      Read more

                      Українські прізвища Зміст Історичні відомості |...

                      Image
                      АдигськіАбхазькіАзербайджанські [en] Албанські [en] АлтайськіАмериканські [en] Афроамериканські [en] АнглійськіАрабськіБашкирськіБілоруські [en] прізвищаБолгарські [en] БоснійськіБурятськіВельські [en] ВепськіВ'єтнамські [en] Вірменські [en] Гавайські [en] ГолландськіГрецькіГрузинськіДанськіЕстонськіЄврейські [en] Юдейські [en] Ефіопія/Еритрея [en] Зімбабвійські [en] Індіанські [en] ІндійськіІндонезійські [en] Ірландські [en] ІсландськіІспанські і португальськіІталійськіКалмицькі [en] КарельськіКазахськіКамбоджійські [en] Канадські [en] КіргизькіКитайські [en] КоміКорейськіЛатиськіЛитовські [en] Лаоські [en] МарійськіМакедонські [en] Малазійські [en] Монгольські [en] МордовськіНімецькіНорвезькіОсетинськіПерські [en] ПольськіПрибалтійськіПортугальськіРосійськіпрізвищаРумунськіСербськіСкандинавськіСлов'янськіСахаСловацькі [en] Сомалійські [en] ТайванськіТайські [en] Татарські [en] ТибетськіТувинськіТурецькі [en] УгорськіУдмуртськіУкраїнськіпрізвищаФіджійські [en] ФінськіФранцузьк
                      Read more