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  1. Core Server
  2. SERVER-5044

$stdDev aggregation operator for standard deviation

    Details

    • Backwards Compatibility:
      Fully Compatible

      Description

      see https://gist.github.com/1886960 for an algorithm to handle calculating standard deviation and variance across many servers.

        Issue Links

          Activity

          Hide
          auto auto (Inactive) added a comment -

          Author:

          {u'username': u'RedBeard0531', u'name': u'Mathias Stearn', u'email': u'mathias@10gen.com'}

          Message: Clean up AccumulatorAvg

          Major change is not inheriting from AccumulatorSum

          Prep for SERVER-5044 $stdDev accumulator
          Branch: master
          https://github.com/mongodb/mongo/commit/982d5d281806d470696809d11dceaa098aed4906

          Show
          auto auto (Inactive) added a comment - Author: {u'username': u'RedBeard0531', u'name': u'Mathias Stearn', u'email': u'mathias@10gen.com'} Message: Clean up AccumulatorAvg Major change is not inheriting from AccumulatorSum Prep for SERVER-5044 $stdDev accumulator Branch: master https://github.com/mongodb/mongo/commit/982d5d281806d470696809d11dceaa098aed4906
          Hide
          KevinLDavenport Kevin Davenport added a comment -

          This is a must have.

          Show
          KevinLDavenport Kevin Davenport added a comment - This is a must have.
          Hide
          itsmejainh Himanshu Jain added a comment -

          Hey, It's a nice to have feature.
          Any updates on this ?

          Show
          itsmejainh Himanshu Jain added a comment - Hey, It's a nice to have feature. Any updates on this ?
          Hide
          xgen-internal-githook Githook User added a comment -

          Author:

          {u'username': u'RedBeard0531', u'name': u'Mathias Stearn', u'email': u'mathias@10gen.com'}

          Message: SERVER-5044 Standard Deviation accumulator operators
          Branch: master
          https://github.com/mongodb/mongo/commit/ac0ff84d3fd4c127af8cbcea560d3793a3c3f131

          Show
          xgen-internal-githook Githook User added a comment - Author: {u'username': u'RedBeard0531', u'name': u'Mathias Stearn', u'email': u'mathias@10gen.com'} Message: SERVER-5044 Standard Deviation accumulator operators Branch: master https://github.com/mongodb/mongo/commit/ac0ff84d3fd4c127af8cbcea560d3793a3c3f131
          Hide
          xgen-internal-githook Githook User added a comment -

          Author:

          {u'username': u'RedBeard0531', u'name': u'Mathias Stearn', u'email': u'mathias@10gen.com'}

          Message: SERVER-5044 Use relative error when testing sharded $stdDev operations
          Branch: master
          https://github.com/mongodb/mongo/commit/faf0663603ed7a27f8c726245b005caa50065f81

          Show
          xgen-internal-githook Githook User added a comment - Author: {u'username': u'RedBeard0531', u'name': u'Mathias Stearn', u'email': u'mathias@10gen.com'} Message: SERVER-5044 Use relative error when testing sharded $stdDev operations Branch: master https://github.com/mongodb/mongo/commit/faf0663603ed7a27f8c726245b005caa50065f81

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              25 Vote for this issue
              Watchers:
              26 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved:
                Days since reply:
                12 weeks ago
                Date of 1st Reply:

                Agile