rcompmargin | R Documentation |
Compute marginal compositions by amalgamating the rest (additively).
rcompmargin(X,d=c(1,2),name="+",pos=length(d)+1,what="data")
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. |
what |
The role of X either |
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.
With the argument what="var"
the function transformes an rcomp
variance to the resulting variance of the resulting composition.
A closed compositions with class "rcomp"
containing the
selected variables given by d
and the the amalgamation column.
MNAR has the highest priority, MAR next and WZERO (BDL,SZ),- values are considered as 0 and reported as BDL in the End.
K.Gerald v.d. Boogaart http://www.stat.boogaart.de, Raimon olosana-Delgado
References missing
acompmargin
, rcomp
data(SimulatedAmounts)
plot.rcomp(sa.tnormals5,margin="rcomp")
plot.rcomp(rcompmargin(sa.tnormals5,c("Cd","Zn")))
plot.rcomp(rcompmargin(sa.tnormals5,c(1,2)))
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