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Select Features for a Data Stream

Source: R/DSF_FeaturesSelection.R
DSF_FeatureSelection.Rd

Selects features from a data stream using a supplied list of features.

Usage

DSF_FeatureSelection(dsd = NULL, features)

Arguments

dsd

An object of class DSD.

features

A character vector of feature (column) names or a numeric vector of feature indices. All other features are removed. Special information columns starting with . are not features.

Value

An object of class DSF_FeatureSelection (subclass of DSF and DSD).

See also

Other DSF: DSF(), DSF_Convolve(), DSF_Downsample(), DSF_ExponentialMA(), DSF_Func(), DSF_Scale(), DSF_dplyr()

Author

Michael Hahsler

Examples

stream <- DSD_Gaussians(k = 3, d = 3)
get_points(stream, 3)
#>          X1         X2        X3 .class
#> 1 0.1322528 1.01377941 0.3140130      3
#> 2 0.2031086 0.13624809 0.8186898      2
#> 3 0.1772421 0.05920681 0.7994196      2

stream_2features <- DSF_FeatureSelection(stream, features = c("X1", "X3"))
stream_2features
#> Gaussian Mixture (d = 3, k = 3)
#> + Feature Selection (X1, X3) 
#> Class: DSF_FeatureSelection, DSF, DSD_R, DSD 

get_points(stream_2features, n = 3)
#>          X1        X3 .class
#> 1 1.0366359 0.1879495      1
#> 2 0.1485016 0.8010295      2
#> 3 0.1554028 0.3438665      3