sample_frac: Sample a fraction of shapes

In Momocs: Morphometrics using R

Sample a fraction of shapes

Description

Sample a fraction of shapes from a Momocs object. See examples and ?dplyr::sample_n.

Usage

sample_frac(tbl, size, replace, fac, ...)

Arguments

tbl	a Momocs object (Coo, Coe)
size	numeric (0 < numeric <= 1) the fraction of shapes to select
replace	logical whether sample should be done with ot without replacement
fac	a column name if a $fac is defined; size is then applied within levels of this factor
...	additional arguments to dplyr::sample_frac and to maintain generic compatibility

Value

a Momocs object of same class

Note

the resulting fraction is rounded with ceiling.

See Also

Other handling functions: arrange(), at_least(), chop(), combine(), dissolve(), fac_dispatcher(), filter(), mutate(), rename(), rescale(), rm_harm(), rm_missing(), rm_uncomplete(), rw_fac(), sample_n(), select(), slice(), subsetize()

Examples

# samples 50% of the bottles no matter their type
sample_frac(bot, 0.5)
# 80% bottles of beer and of whisky
table(sample_frac(bot, 0.8, fac="type")$fac)
# bootstrap the same number of bootles of each type but with replacement
table(names(sample_frac(bot, 1, replace=TRUE)))

Momocs documentation built on Nov. 13, 2023, 5:07 p.m.