# StandardScaler

#### class StandardScaler extends PreprocessorFitter

Scales columns to mean 0 and unit variance

An important note- The equivelent call in R would be something like ```r N <- nrow(x) scale(x, scale= apply(x, 2, sd) * sqrt(N-1/N)) ```

This is because R uses degrees of freedom = 1 to calculate standard deviation. Multiplying the standard deviation by sqrt(N-1/N) 'undoes' this correction.

The StandardScaler of sklearn uses degrees of freedom = 0 for its calculation, so results should be similar.

Linear Supertypes
Ordering
1. Alphabetic
2. By inheritance
Inherited
1. StandardScaler
2. PreprocessorFitter
3. UnsupervisedFitter
4. Fitter
5. AnyRef
6. Any
1. Hide All
2. Show all
Visibility
1. Public
2. All

### Value Members

1. #### final def !=(arg0: AnyRef): Boolean

Definition Classes
AnyRef
2. #### final def !=(arg0: Any): Boolean

Definition Classes
Any
3. #### final def ##(): Int

Definition Classes
AnyRef → Any
4. #### final def ==(arg0: AnyRef): Boolean

Definition Classes
AnyRef
5. #### final def ==(arg0: Any): Boolean

Definition Classes
Any
6. #### final def asInstanceOf[T0]: T0

Definition Classes
Any
7. #### def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
8. #### final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
9. #### def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
10. #### def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )

12. #### def fitTransform[K](input: DrmLike[K], hyperparameters: (Symbol, Any)*): DrmLike[K]

Definition Classes
PreprocessorFitter
13. #### final def getClass(): Class[_]

Definition Classes
AnyRef → Any
14. #### def hashCode(): Int

Definition Classes
AnyRef → Any
15. #### final def isInstanceOf[T0]: Boolean

Definition Classes
Any
16. #### var model: PreprocessorModel

Definition Classes
PreprocessorFitter
17. #### final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
18. #### final def notify(): Unit

Definition Classes
AnyRef
19. #### final def notifyAll(): Unit

Definition Classes
AnyRef
20. #### final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
21. #### def toString(): String

Definition Classes
AnyRef → Any
22. #### final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
23. #### final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
24. #### final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )