Math

A set of wrappers around the functions from the libm library and the Yandex utilities.

Constants

List of functions

  • Math::Pi() -> Double
  • Math::E() -> Double
  • Math::Eps() -> Double

Examples

1. SELECT Math::Pi(); -- 3.141592654
2. SELECT Math::E();  -- 2.718281828
3. SELECT Math::Eps(); -- 2.220446049250313e-16

Math - 图1

(Double) -> Bool

List of functions

  • Math::IsInf(Double{Flags:AutoMap}) -> Bool
  • Math::IsNaN(Double{Flags:AutoMap}) -> Bool
  • Math::IsFinite(Double{Flags:AutoMap}) -> Bool

Examples

1. SELECT Math::IsNaN(0.0/0.0);    -- true
2. SELECT Math::IsFinite(1.0/0.0); -- false

Math - 图2

(Double) -> Double

List of functions

  • Math::Abs(Double{Flags:AutoMap}) -> Double
  • Math::Acos(Double{Flags:AutoMap}) -> Double
  • Math::Asin(Double{Flags:AutoMap}) -> Double
  • Math::Asinh(Double{Flags:AutoMap}) -> Double
  • Math::Atan(Double{Flags:AutoMap}) -> Double
  • Math::Cbrt(Double{Flags:AutoMap}) -> Double
  • Math::Ceil(Double{Flags:AutoMap}) -> Double
  • Math::Cos(Double{Flags:AutoMap}) -> Double
  • Math::Cosh(Double{Flags:AutoMap}) -> Double
  • Math::Erf(Double{Flags:AutoMap}) -> Double
  • Math::ErfInv(Double{Flags:AutoMap}) -> Double
  • Math::ErfcInv(Double{Flags:AutoMap}) -> Double
  • Math::Exp(Double{Flags:AutoMap}) -> Double
  • Math::Exp2(Double{Flags:AutoMap}) -> Double
  • Math::Fabs(Double{Flags:AutoMap}) -> Double
  • Math::Floor(Double{Flags:AutoMap}) -> Double
  • Math::Lgamma(Double{Flags:AutoMap}) -> Double
  • Math::Rint(Double{Flags:AutoMap}) -> Double
  • Math::Sigmoid(Double{Flags:AutoMap}) -> Double
  • Math::Sin(Double{Flags:AutoMap}) -> Double
  • Math::Sinh(Double{Flags:AutoMap}) -> Double
  • Math::Sqrt(Double{Flags:AutoMap}) -> Double
  • Math::Tan(Double{Flags:AutoMap}) -> Double
  • Math::Tanh(Double{Flags:AutoMap}) -> Double
  • Math::Tgamma(Double{Flags:AutoMap}) -> Double
  • Math::Trunc(Double{Flags:AutoMap}) -> Double
  • Math::Log(Double{Flags:AutoMap}) -> Double
  • Math::Log2(Double{Flags:AutoMap}) -> Double
  • Math::Log10(Double{Flags:AutoMap}) -> Double

Examples

1. SELECT Math::Sqrt(256);     -- 16
2. SELECT Math::Trunc(1.2345); -- 1

Math - 图3

(Double, Double) -> Double

List of functions

  • Math::Atan2(Double{Flags:AutoMap}, Double{Flags:AutoMap}) -> Double
  • Math::Fmod(Double{Flags:AutoMap}, Double{Flags:AutoMap}) -> Double
  • Math::Hypot(Double{Flags:AutoMap}, Double{Flags:AutoMap}) -> Double
  • Math::Pow(Double{Flags:AutoMap}, Double{Flags:AutoMap}) -> Double
  • Math::Remainder(Double{Flags:AutoMap}, Double{Flags:AutoMap}) -> Double

Examples

1. SELECT Math::Atan2(1, 0);       -- 1.570796327
2. SELECT Math::Remainder(2.1, 2); -- 0.1

Math - 图4

(Double, Int32) -> Double

List of functions

  • Math::Ldexp(Double{Flags:AutoMap}, Int32{Flags:AutoMap}) -> Double
  • Math::Round(Double{Flags:AutoMap}, [Int32?]) -> Double: The second argument indicates the power of 10 to which we round (it’s negative for decimal digits and positive for rounding to tens, thousands, or millions); the default value is 0

Examples

1. SELECT Math::Pow(2, 10);        -- 1024
2. SELECT Math::Round(1.2345, -2); -- 1.23

Math - 图5

(Double, Double, [Double?]) -> Bool

List of functions

  • Math::FuzzyEquals(Double{Flags:AutoMap}, Double{Flags:AutoMap}, [Double?]) -> Bool: Compares two Doubles for being inside the neighborhood specified by the third argument; the default value is 1.0e-13

Examples

1. SELECT Math::FuzzyEquals(1.01, 1.0, 0.05); -- true

Math - 图6

Functions for computing remainders

List of functions

  • Math::Mod(Int64{Flags:AutoMap}, Int64) -> Int64?
  • Math::Rem(Int64{Flags:AutoMap}, Int64) -> Int64?

These functions behave similarly to the built-in % operator in the case of non-negative arguments. The differences are noticeable in the case of negative arguments:

  • Math::Mod preserves the sign of the second argument (the denominator).
  • Math::Rem preserves the sign of the first argument (the numerator). Functions return null if the divisor is zero.

Examples

1. SELECT Math::Mod(-1, 7);        -- 6
2. SELECT Math::Rem(-1, 7);        -- -1

Math - 图7