MinMax Scaler


The MinMax scaler scales the given data set, so that all values will lie between a user specified range [min,max]. In case the user does not provide a specific minimum and maximum value for the scaling range, the MinMax scaler transforms the features of the input data set to lie in the [0,1] interval. Given a set of input data $x_1, x_2,… x_n$, with minimum value:

and maximum value:

The scaled data set $z_1, z_2,…,z_n$ will be:

where $\textit{min}$ and $\textit{max}$ are the user specified minimum and maximum values of the range to scale.


MinMaxScaler is a Transformer. As such, it supports the fit and transform operation.


MinMaxScaler is trained on all subtypes of Vector or LabeledVector:

  • fit[T <: Vector]: DataSet[T] => Unit
  • fit: DataSet[LabeledVector] => Unit


MinMaxScaler transforms all subtypes of Vector or LabeledVector into the respective type:

  • transform[T <: Vector]: DataSet[T] => DataSet[T]
  • transform: DataSet[LabeledVector] => DataSet[LabeledVector]


The MinMax scaler implementation can be controlled by the following two parameters:

Parameters Description

The minimum value of the range for the scaled data set. (Default value: 0.0)


The maximum value of the range for the scaled data set. (Default value: 1.0)


// Create MinMax scaler transformer
val minMaxscaler = MinMaxScaler()

// Obtain data set to be scaled
val dataSet: DataSet[Vector] = ...

// Learn the minimum and maximum values of the training data

// Scale the provided data set to have min=-1.0 and max=1.0
val scaledDS = minMaxscaler.transform(dataSet)

Back to top