R: Symbolize Volume Fraction on a Soil Profile Collection Plot

addVolumeFraction {aqp}

R Documentation

Symbolize Volume Fraction on a Soil Profile Collection Plot

Description

Symbolize volume fraction on an existing soil profile collection plot.

Usage

addVolumeFraction(x, colname, res = 10, cex.min = 0.1, 
cex.max = 0.5, pch = 1, col = "black")

Arguments

`x`	a `SoilProfileCollection` object
`colname`	character vector of length 1, naming the column containing volume fraction data (horizon-level attribute)
`res`	integer, resolution of the grid used to symbolize volume fraction
`cex.min`	minimum symbol size
`cex.max`	maximum symbol size
`pch`	plotting character
`col`	color of the symbol

Details

This function can only be called after plotting a SoilProfileCollection object.

Note

Details associated with a call to plot.SoilProfileCollection are automatically accounted for within this function: e.g. plot.order, width, etc.

Author(s)

D.E. Beaudette

Examples

# sample data
data(loafercreek, package='soilDB')

# subset first 10 profiles 
s <- loafercreek[1:10, ]

# replace 0% frags with NA
s$total_frags_pct[which(s$total_frags_pct == 0)] <- NA

# plot in random order, note that annotations follow
par(mar=c(0, 0, 3, 0))
plot(s, color='total_frags_pct', plot.order=sample(1:length(s)))
addVolumeFraction(s, 'total_frags_pct', pch=1)

plot of chunk unnamed-chunk-1

par(mar=c(0, 0, 0, 0))
plot(s, max.depth=100, name='total_frags_pct', cex.name=1, axis.line.offset=-4.25)
addVolumeFraction(s, 'total_frags_pct', pch=1)