Libraries.Compute.Statistics.Calculations.Median

This class calculates the median of a particular DataFrameColumn.

Example Code

use Libraries.Compute.Statistics.DataFrame
    use Libraries.Compute.Statistics.Calculations.Median

    //Load a comma separated file
    DataFrame frame
    frame:Load("Data.csv") 
    Median median
    DataFrameColumn column = frame:GetColumn(0)
    column:Calculate(median)
    output median:GetMedian()

If the calculation otherwise has no primitive type, it sends it to the column as a raw object. Columns might use this if they have custom types.

If the calculation returns true from IsIterable, this is an Integer object that was passed to the calculation. This may be undefined, which indicates that the column did not contain a value at this position in the column.

If the calculation returns true from IsIterable, this is a Boolean object that was passed to the calculation. This may be undefined, which indicates that the column did not contain a value at this position in the column.

If the calculation returns true from IsIterable, this is a Number object that was passed to the calculation. This may be undefined, which indicates that the column did not contain a value at this position in the column.

If the calculation returns true from IsIterable, this is a Text object that was passed to the calculation. This may be undefined, which indicates that the column did not contain a value at this position in the column.

This action compares two object hash codes and returns an integer. The result is larger if this hash code is larger than the object passed as a parameter, smaller, or equal. In this case, -1 means smaller, 0 means equal, and 1 means larger. This action was changed in Quorum 7 to return an integer, instead of a CompareResult object, because the previous implementation was causing efficiency issues.

Example Code

Object o
        Object t
        integer result = o:Compare(t) //1 (larger), 0 (equal), or -1 (smaller)

This Calculation can be re-used if the Empty action is called before passing it to another column. Otherwise, it retains its data.

This action is called at the end of a calculation.

This action determines if two objects are equal based on their hash code values.

Example Code

use Libraries.Language.Object
        use Libraries.Language.Types.Text
        Object o
        Text t
        boolean result = o:Equals(t)

This action gets the hash code for an object.

Example Code

Object o
        integer hash = o:GetHashCode()

Returns the median of the column.