rcompmargin {compositions}R Documentation

Marginal compositions in real geometry

Description

Compute marginal compositions by amalgamating the rest (additively).

Usage

          rcompmargin(X,d=c(1,2),name="+",pos=length(d)+1)
          

Arguments

X composition or dataset of compositions
d vector containing the indices xor names of the columns to be kept
name The new name of the amalgamation column
pos The position where the new amalgamation column should be stored. This defaults to the last column.

Details

The amalgamation column is simply computed by adding the non-selected components after closing the composition. This is consistent with the rcomp approach and is widely used because of its easy interpretation. However, it often leads to difficult-to-read ternary diagrams and is inconsistent with the acomp approach.

Value

A closed compositions with class "rcomp" containing the selected variables given by d and the the amalgamation column.

Author(s)

K.Gerald v.d. Boogaart http://www.stat.boogaart.de, Raimon olosana-Delgado

References

See Also

acompmargin, rcomp

Examples

data(SimulatedAmounts)
plot.rcomp(sa.tnormals5,margin="rcomp")
plot.rcomp(rcompmargin(sa.tnormals5,c("Cd","Zn")))
plot.rcomp(rcompmargin(sa.tnormals5,c(1,2)))


[Package compositions version 0.9-11 Index]