Uploaded image for project: 'Documentation'
  1. Documentation
  2. DOCS-14703

Derivative and Integral documentation updates

    XMLWordPrintableJSON

Details

    Description

      It would be better to rephrase the definitions of derivative and integral functions as shown below to make them more technically accurate.

       

      Current

       

      $integral

      Returns an approximation for the mathematical integral value, which is calculated using the trapezoidal rule with each set of adjacent documents forming a trapezoid using the:

       

      Updated

       

      $integral

      Returns the approximation of the area under the curve calculated using the trapezoidal rule where each set of adjacent documents form a trapezoid using the:

       

      Current

      $derivative

      Returns the mathematical derivative value, which is calculated using the:

      • First and last documents in the $setWindowFields stage window.
      • Numerator, which is set to the result of subtracting the numeric expression value for the first document from the expression value for the last document.
      • Denominator, which is set to the result of subtracting the sortBy field value for the first document from the sortBy field value for the last document.

       

      Updated

       

      $derivative

      Returns the average rate of change within the specified window, which is calculated using the:

      • First and last documents in the $setWindowFields stage window.
      • Numerator, which is set to the result of subtracting the numeric expression value for the first document from the expression value for the last document.
      • Denominator, which is set to the result of subtracting the sortBy field value for the first document from the sortBy field value for the last document.

      Attachments

        Activity

          People

            jason.price@mongodb.com Jason Price
            bora.beran@mongodb.com Bora Beran (Inactive)
            Votes:
            0 Vote for this issue
            Watchers:
            2 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved:
              2 years, 25 weeks, 2 days ago