Returns samples from the values of track expression

Returns a sample of the specified size from the values of track expression.

Usage

gsample(expr = NULL, n = NULL, intervals = NULL, iterator = NULL, band = NULL)

Arguments

expr

track expression

n

a number of items to choose

intervals

genomic scope for which the function is applied

iterator

track expression iterator. If 'NULL' iterator is determined implicitly based on track expression.

band

track expression band. If 'NULL' no band is used.

Value

An array that represent quantiles.

Details

This function returns a sample of the specified size from the values of track expression. If 'n' is less than the total number of values, the data is randomly sampled. Call set.seed() before this function to make the sample reproducible.

If 'n' is higher than the total number of values, all values are returned (yet reshuffled).

See also

gextract

Examples

gdb.init_examples()
gsample("sparse_track", 10)
#>  [1] 0.44 0.40 0.36 0.44 0.36 0.36 0.36 0.44 0.40 0.46