Method: Polars::Expr#log

Defined in:
lib/polars/expr.rb

#log(base = Math::E) ⇒ Expr

Compute the logarithm to a given base.

Examples:

df = Polars::DataFrame.new({"a" => [1, 2, 3]})
df.select(Polars.col("a").log(2))
# =>
# shape: (3, 1)
# ┌──────────┐
# │ a        │
# │ ---      │
# │ f64      │
# ╞══════════╡
# │ 0.0      │
# │ 1.0      │
# │ 1.584963 │
# └──────────┘

Parameters:

  • base (Float) (defaults to: Math::E) —

    Given base, defaults to e.

Returns:



7575
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# File 'lib/polars/expr.rb', line 7575

def log(base = Math::E)
  base_rbexpr = Utils.parse_into_expression(base)
  wrap_expr(_rbexpr.log(base_rbexpr))
end