scaling: Scaling Data

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Description

Auxiliary function to scale data.

Usage

scale01(x, method=c("columnwise", "rowwise", "all", "pobs"), ...)

Arguments

x	A numeric vector or (n,d)-matrix or (n,d)-data.frame containing the data to be scaled to [0,1].
method	A character string indicating the scaling method to be used. Available are: "columnwise": Scales x columnwise. "rowwise": Scales x rowwise. "all": Scales all components of x simultaneously. "pobs": Applies columnwise the respective empirical distribution function to x; see the R\ package “copula” for more details.
...	Additional arguments passed to rank() (for method="pobs") and range() (for all other methods).

Details

If x is a matrix and method="columnwise", the same scaling can be achieved, for example, with scale(x, center=apply(z, 2, min), scale=apply(z, 2, function(x) diff(range(x)))).

Value

scale01() returns a matrix of the same dimensions as x, but linearly scaled to lie in [0,1].

Author(s)

Marius Hofert and Wayne Oldford

See Also

zenplot() where scale01() is used. scale() for center-scale type of scaling of matrix-like objects (only).

Examples

## Implementation
scale01

zenplots documentation built on May 2, 2019, 4:34 p.m.