get.triprop {plotrix} | R Documentation |
Enter three proportion data - usually soil textures
Description
‘get.triprop’ allows the user to enter triplets of proportions or percentages of three components such as sand, silt and clay in soils.
Usage
get.triprop(use.percentages=FALSE,cnames=c("1st","2nd","3rd"))
Arguments
use.percentages |
Logical - whether to treat the entries as percentages and scale to proportions. |
cnames |
column names for the resulting three column matrix. |
Details
The three proportions of each row must sum to 100 or 1 within 1% or the function will warn the operator.
Value
A matrix of the components of one or more observations.
Author(s)
Jim Lemon
See Also
Examples
if(dev.interactive()) {
# get some proportions
newsp<-get.triprop()
# show the triangle
triax.frame(main="Test triax.plot")
# now plot the observations
triax.points(newsp)
}
[Package plotrix version 3.8-4 Index]