logtGml2_trans {flowWorkspace} | R Documentation |
Used to construct GML 2.0 flog transformer object.
logtGml2_trans(t = 262144, m = 4.5, n = 6, equal.space = FALSE)
t |
top scale value |
m |
number of decades |
n |
desired number of breaks (the actual number will be different depending on the data range) |
equal.space |
whether breaks at equal-spaced intervals |
GML 2.0 standard log transform function constructor. The definition is as in the GML 2.0 standard section 6.2 "parametrized logarithmic transformation – flog" This deviates from standard only in the following way. Before applying the logarithmic transformation, non-positive values are assigned the smallest positive value from the input rather than having undefined values (NA) under the transformation.
logtGml2 transformation object
trans.obj <- logtGml2_trans(t = 1e3, m = 1, equal.space = TRUE) data <- 1:1e3 brks.func <- trans.obj[["breaks"]] brks <- brks.func(data) brks # fasinh space displayed at raw data scale #transform it to verify it is equal-spaced at transformed scale trans.func <- trans.obj[["transform"]] brks.trans <- trans.func(brks) brks.trans