milliseconds

Source code

Description

Extract the milliseconds from a Duration type.

Usage

<Expr>$dt$total_milliseconds()

Value

Expr of i64

Examples

library("polars")

df = pl$DataFrame(date = pl$datetime_range(
  start = as.POSIXct("2020-1-1", tz = "GMT"),
  end = as.POSIXct("2020-1-1 00:00:01", tz = "GMT"),
  interval = "1ms"
))
df$select(
  pl$col("date"),
  diff_millisec = pl$col("date")$diff()$dt$total_milliseconds()
)

#> shape: (1_001, 2)
#> ┌─────────────────────────────┬───────────────┐
#> │ date                        ┆ diff_millisec │
#> │ ---                         ┆ ---           │
#> │ datetime[ms, GMT]           ┆ i64           │
#> ╞═════════════════════════════╪═══════════════╡
#> │ 2020-01-01 00:00:00 GMT     ┆ null          │
#> │ 2020-01-01 00:00:00.001 GMT ┆ 1             │
#> │ 2020-01-01 00:00:00.002 GMT ┆ 1             │
#> │ 2020-01-01 00:00:00.003 GMT ┆ 1             │
#> │ 2020-01-01 00:00:00.004 GMT ┆ 1             │
#> │ …                           ┆ …             │
#> │ 2020-01-01 00:00:00.996 GMT ┆ 1             │
#> │ 2020-01-01 00:00:00.997 GMT ┆ 1             │
#> │ 2020-01-01 00:00:00.998 GMT ┆ 1             │
#> │ 2020-01-01 00:00:00.999 GMT ┆ 1             │
#> │ 2020-01-01 00:00:01 GMT     ┆ 1             │
#> └─────────────────────────────┴───────────────┘