Select Subset of Rows

This function selects subset of rows from data set. This is usefull if data is large and we need just a sample to calculate profiles.

select_sample(data, n = 100, seed = 1313)

Arguments

data	set of observations. Profile will be calculated for every observation (every row)
n	named list of vectors. Elements of the list are vectors with points in which profiles should be calculated. See an example for more details.
seed	seed for random number generator.

Value

a data frame with selected rows

Details

Note that select_subsample function is S3 generic. If you want to work on non standard data sources (like H2O ddf, external databases) you should overload it.

Examples

library("DALEX")
small_apartments <- select_sample(apartmentsTest)
head(small_apartments)
#>      m2.price construction.year surface floor no.rooms    district
#> 8946     2174              1959     123     8        4        Wola
#> 4458     4319              1927      68     8        2      Ochota
#> 7384     5501              1929      95     5        3 Srodmiescie
#> 5450     2810              1982     124    10        5      Ochota
#> 6744     1770              1982     143     9        6     Ursynow
#> 6688     2796              1938      75     7        3        Wola