SignedLog | R Documentation |
Computes the Signed Log if Data
SignedLog(Data,Base="Ten")
Data |
[1:n,1:d] Data matrix with n cases and d variables |
Base |
Either "Ten", "Two", "Zero", or any number. |
A neat transformation for data, it it has a better representation on the log scale.
Transformed Data
Number Selections for Base
for 2,10, "Two" or "Ten" add 1 to every datapoint as defined in the lectures.
Michael Thrun
Prof. Dr. habil. A. Ultsch, Lectures in Knowledge Discovery, 2014.
log
# sampling is done
# because otherwise the example takes too long
# in the CRAN check
data('ITS')
ind=sample(length(ITS),1000)
MDplot(SignedLog(cbind(ITS[ind],MTY[ind])*(-1),Base = "Ten"))
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