Description Usage Arguments Value Note Author(s) References Examples
Applies the UfsCov algorithm based on the space filling concept, by using a sequatial forward search (for memory efficient storage of large data on disk and fast access).
1 |
data |
Data of class: |
blocks |
Number of splits to facilitate the computation of the distance matrix (by default: blocks=2). |
A list of two elements:
CovD
a vector containing the coverage measure of
each step of the SFS.
IdR
a vector containing the added variables during
the selection procedure.
This function is still under developement.
Mohamed Laib Mohamed.Laib@unil.ch
M. Laib and M. Kanevski (2017). Unsupervised Feature Selection Based on Space Filling Concept, arXiv:1706.08894.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | ## Not run:
#### Infinity dataset ####
N <- 1000
dat<-Infinity(N)
Results<- UfsCov_ff(dat)
cou<-colnames(dat)
nom<-cou[Results[[2]]]
par(mfrow=c(1,1), mar=c(5,5,2,2))
names(Results[[1]])<-cou[Results[[2]]]
plot(Results[[1]] ,pch=16,cex=1,col="blue", axes = FALSE,
xlab = "Added Features", ylab = "Coverage measure")
lines(Results[[1]] ,cex=2,col="blue")
grid(lwd=1.5,col="gray" )
box()
axis(2)
axis(1,1:length(nom),nom)
which.min(Results[[1]])
#### Butterfly dataset ####
require(IDmining)
N <- 1000
raw_dat <- Butterfly(N)
dat<-raw_dat[,-9]
Results<- UfsCov_ff(dat)
## End(Not run)
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