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object Variable extends Error with Serializable

The Variable object provides utilities for variables.

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Value Members

  1. val VAL0: Double
  2. val VAL1: Double
  3. def dummyVar(tt: Int, shf: Int = shift, tmx: Int = tmax): VectoD

    Assign values for dummy variables based on a single categorical/treatment value 'tt'.

    Assign values for dummy variables based on a single categorical/treatment value 'tt'.

    tt

    the categorical/treatment value

    tmx

    the maximum categorical/treatment after shifting

  4. def dummyVars(tt: VectoI): MatriD

    Assign values for the dummy variables based on the categorical/treatment vector 'tt'.

    Assign values for the dummy variables based on the categorical/treatment vector 'tt'. A single categorical variable 'tt' with values 'ttmin' to 'ttmax' will be (1) shifted to the range 0 to 'tmax' and then replace by 'tmax' dummy variables/columns as follows:

    0 => 0, 0, 0 OR 1, 1, 1 1 => 1, 0, 0 OR 2, 1, 1 2 => 0, 1, 0 OR 1, 2, 1 3 => 0, 0, 1 OR 1, 1, 2

    Using (0, 1) for (VAL0, VAL1) is conventional, but using (1, 2) reduces collinearity, for example in QuadRegression. Note: one-hot encoding using 3 dummy variable leads to singular matrices.

    tt

    the categorical/treatment vector

  5. final def flaw(method: String, message: String): Unit
    Definition Classes
    Error
  6. def get_shift_tmax: (Int, Int)

    Return the shift in categorical/treatment variable to make it start at zero as well as the maximum value after shifting.

    Return the shift in categorical/treatment variable to make it start at zero as well as the maximum value after shifting. Must call 'dummyVars' first