set_levels | R Documentation |
Set one or more simulation levels, which are things that vary between simulation replicates.
set_levels(sim, ..., .keep = NA)
sim |
A simulation object of class |
... |
One or more key-value pairs representing simulation levels. Each value can either be a vector (for simple levels) or a list of lists (for more complex levels). See examples. |
.keep |
An integer vector specifying which level combinations to keep; see examples. |
The original simulation object with the old set of levels replaced with the new set
# Basic usage is as follows:
sim <- new_sim()
sim %<>% set_levels(
"n" = c(10, 100, 1000),
"theta" = c(2, 3)
)
sim$levels
# More complex levels can be set using lists:
sim <- new_sim()
sim %<>% set_levels(
"n" = c(10, 100, 1000),
"theta" = c(2, 3),
"method" = list(
"spline1" = list(knots=c(2,4), slopes=c(0.1,0.4)),
"spline2" = list(knots=c(1,5), slopes=c(0.2,0.3))
)
)
sim$levels
# If you don't want to run simulations for all level combinations, use the
# .keep option. First, set the levels normally. Second, view the
# sim$levels_grid dataframe to examine the level combinations and the
# associated level_id values. Third, call set_levels again with the .keep
# option to specify which levels to keep (via a vector of level_id values).
sim <- new_sim()
sim %<>% set_levels(alpha=c(1,2,3), beta=c(5,6))
sim$levels_grid
#> level_id alpha beta
#> 1 1 1 5
#> 2 2 2 5
#> 3 3 3 5
#> 4 4 1 6
#> 5 5 2 6
#> 6 6 3 6
sim %<>% set_levels(.keep=c(1,2,6))
sim$levels_grid
#> level_id alpha beta
#> 1 1 1 5
#> 2 2 2 5
#> 6 6 3 6
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