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with_time_unit

Source code

Description

Set time unit of a Series of dtype Datetime or Duration. This does not modify underlying data, and should be used to fix an incorrect time unit. The corresponding global timepoint will change.

Usage

<Expr>$dt$with_time_unit(tu = c("ns", "us", "ms"))

Arguments

tu string option either ‘ns’, ‘us’, or ‘ms’

Value

Expr of i64

Examples

library(polars)

df = pl$DataFrame(
  date = pl$datetime_range(
    start = as.Date("2001-1-1"),
    end = as.Date("2001-1-3"),
    interval = "1d1s"
  )
)
df$select(
  pl$col("date"),
  pl$col("date")$dt$with_time_unit()$alias("with_time_unit_ns"),
  pl$col("date")$dt$with_time_unit(tu = "ms")$alias("with_time_unit_ms")
)
#> shape: (2, 3)
#> ┌─────────────────────┬─────────────────────────┬───────────────────────┐
#> │ date                ┆ with_time_unit_ns       ┆ with_time_unit_ms     │
#> │ ---                 ┆ ---                     ┆ ---                   │
#> │ datetime[μs]        ┆ datetime[ns]            ┆ datetime[ms]          │
#> ╞═════════════════════╪═════════════════════════╪═══════════════════════╡
#> │ 2001-01-01 00:00:00 ┆ 1970-01-12 07:45:07.200 ┆ +32971-04-28 00:00:00 │
#> │ 2001-01-02 00:00:01 ┆ 1970-01-12 07:46:33.601 ┆ +32974-01-22 00:16:40 │
#> └─────────────────────┴─────────────────────────┴───────────────────────┘