modifies data.table in place

modifies data.table in place, alias for modify with copy=TRUE and sequential=TRUE. It follows the naming convention in data.table to prefix methods that change objects (byreference) with set.

setmodify(dat, x, ...)

Arguments

dat	data.table() object
x	dcmodify::modifier object.
...	not used

See also

Other modify: modify,data.table,modifier-method

Examples

library(data.table)

m <- modifier( if (age > 130) age = 130
             , income[age < 12] <- 0
             )

dat <- fread(text =
"age, income
 140,  300
  11, 2000
  25, 3000"
)

# modify a copy of the data
dat_m <- modify(dat, m, copy = TRUE)
print(dat_m)
#>    age income
#> 1: 130    300
#> 2:  11      0
#> 3:  25   3000

# the data it self
setmodify(dat, m)
print(dat)
#>    age income
#> 1: 130    300
#> 2:  11      0
#> 3:  25   3000