sampleBy: sample a Spatial*DataFrame by according to a factorial column

In environmentalinformatics-marburg/gpm: Geospatial predictive modeling using parameterized and unparameterized models.

Description

This function samples a Spatial*DataFrame according to a specified column so that all factor levels are sampled n times. If there are less or equal entries in any levels these are sampled completely.

Usage

sampleBy(x, col, n = 1, seed = NULL, ...)

Arguments

x	a Spatial*DataFrame
col	the column used for the sampling
n	the amount of samples to be taken from each level of col
seed	an optional seed to be used for the random sample-ing.
...	additional arguments passed to sample, e.g. drop = ...

Value

a list with entries sample_set (the samples) and remainder (the remainder).

See Also

sample for details on the random sampling

Examples

# Not run
library(sp)

data(meuse)
coordinates(meuse) <- ~ x + y

sampleBy(meuse, col = "landuse", n = 1)

environmentalinformatics-marburg/gpm documentation built on July 11, 2020, 11:12 a.m.