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o

scalation.columnar_db

MissingValues

object MissingValues

The MissingValues object is used to replace missing values in a dataset.

See also

www.utexas.edu/cola/prc/_files/cs/Missing-Data.pdf

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  8. def estimateStats(xy: Table, missingCol: String, missingStr: String = "?"): (Double, Double)

    Estimate the mean and variance for the column in table 'xy' having missing values.

    Estimate the mean and variance for the column in table 'xy' having missing values.

    xy

    the table/relation with missing values

    missingCol

    the name of column having missing values

    missingStr

    the string used to denote a missing value (defaults to '?')

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  16. def replaceMissingValues(xy: Table, ignore: Seq[Int], missingCol: String, missingStr: String = "?"): Table

    Replace missing values in column 'missingCol' of table 'xy' and return a new table 'xy2' with the replaced values and excluded columns removed.

    Replace missing values in column 'missingCol' of table 'xy' and return a new table 'xy2' with the replaced values and excluded columns removed.

    xy

    the table/relation with missing values

    ignore

    the columns to ignore/exclude

    missingCol

    the name of column having missing values

    missingStr

    the string used to denote a missing value (defaults to '?')

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