rplusarithm {compositions} | R Documentation

## vectorial arithmetic for data sets with rplus class

### Description

The positive quadrant forms a manifold of the real vector space. The induced operations +,-,*,/ give results valued in this real vector space (not necessarily inside the manifold).

### Usage

    mul.rplus(x,r)
    ## Methods for class rplus
    ##   x+y
    ##  x-y
    ##   -x
    ##   x*r
    ##   r*x
    ##   x/r

### Arguments

`x` | an rplus composition or dataset of compositions
`y` | an rplus composition or dataset of compositions
`r` | a numeric vector of size 1 or nrow(x)

### Details

The functions behave quite like `+.rmult`.

### Value

`rmult`-objects containing the given operations on the rcomp manifold as subset of the R^D. Only the addition and multiplication with positive numbers are internal operation and results in an `rplus`-object again.

### Note

For `*` the arguments x and y can be exchanged.

### Author(s)

K.Gerald v.d. Boogaart http://www.stat.boogaart.de

### See Also

`+.rmult`, `+.acomp`,`cpt`, `rcomp`, `rmult`

### Examples

    rplus(1:5)* -1 + rplus(1:5)
    data(SimulatedAmounts)
    cdata <- rplus(sa.lognormals)
    plot( tmp <- (cdata-mean(cdata))/msd(cdata) )
    class(tmp)
    mean(tmp)
    msd(tmp)
    var(tmp)

[Package compositions version 0.91-6 Index]