Description Usage Arguments Details Value Note Author(s) See Also Examples
Generate a levelplot of missing data from a SoilProfileCollection object.
1 2 | missingDataGrid(s, max_depth, vars, filter.column = NULL,
filter.regex = NULL, cols = NULL, ...)
|
s |
a SoilProfilecollection object |
max_depth |
integer specifying the max depth of analysis |
vars |
character vector of column names over which to evaluate missing data |
filter.column |
a character string naming the column to apply the filter REGEX to |
filter.regex |
a character string with a regular expression used to filter horizon data OUT of the analysis |
cols |
a vector of colors |
... |
additional arguments passed on to |
This function evaluates a 'missing data fraction' based on slice-wise evaulation of named variables in a SoilProfileCollection
object.
A data.frame
describing the percentage of missing data by variable.
A lattice graphic is printed to the active output device.
D.E. Beaudette
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | ## visualizing missing data
# 10 random profiles
require(plyr)
s <- ldply(1:10, random_profile)
# randomly sprinkle some missing data
s[sample(nrow(s), 5), 'p1'] <- NA
s[sample(nrow(s), 5), 'p2'] <- NA
s[sample(nrow(s), 5), 'p3'] <- NA
# set all p4 and p5 attributes of `soil 1' to NA
s[which(s$id == '1'), 'p5'] <- NA
s[which(s$id == '1'), 'p4'] <- NA
# upgrade to SPC
depths(s) <- id ~ top + bottom
# plot missing data via slicing + levelplot
missingDataGrid(s, max_depth=100, vars=c('p1', 'p2', 'p3', 'p4', 'p5'),
main='Missing Data Fraction')
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