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$tanh（式演算子）

$tanh

ラジアンで測定された値の双曲線タンジェントを返します。

$tanh の構文は次のとおりです。

{ $tanh: <expression> }

$tanh takes any valid expression that resolves to a number, measured in radians. If the expression returns a value in degrees, use the $degreesToRadians operator to convert the value to radians.

By default $tanh returns values as a double. $tanh can also return values as a 128-bit decimal if the <expression> resolves to a 128-bit decimal value.

式の詳細については、「式」を参照してください。

動作

`null`、`NaN` 、`+/- Infinity`

If the input argument resolves to a value of null or refers to a field that is missing, $tanh returns null. If the argument resolves to NaN, $tanh returns NaN. If the argument resolves to negative or positive Infinity, $tanh returns -1 or 1 respectively.

例	結果
`{ $tanh: NaN }`	`NaN`
`{ $tanh: null }`	`null`
`{ $tanh: -Infinity }`	`-1`
`{ $tanh: Infinity }`	`1`

例

次のtrigonometryコレクションには、度単位で測定されたangle値を保存するドキュメントが含まれています。

db.trigonometry.insertOne(
   {
      "_id" : ObjectId( "5c50782193f833234ba90d45" ),
      "angle" : Decimal128( "53.1301023541559787031443874490659" )
   }
)

The following aggregation operation uses the $tanh expression to calculate the hyperbolic tangent of angle and adds it to the input document using the $addFields pipeline stage:

db.trigonometry.aggregate( [
   {
      $addFields : {
         "tanh_output" : { $tanh : { $degreesToRadians : "$angle" } }
      }
   }
] )

$degreesToRadians式は、 angleを度単位でラジアンに変換します。

出力例:

{
   "_id" : ObjectId("5c50782193f833234ba90d45"),
   "angle" : Decimal128("53.1301023541559787031443874490659"),
   "tanh_output" : Decimal128("0.7293303448445332820512777329448416")
}

Because angle is stored as a 128-bit decimal, the $tanh output is also a 128-bit decimal.

次のtrigonometryコレクションには、ラジアンで測定されたangle値を保存するドキュメントが含まれています。

db.trigonometry.insertOne(
   {
      "_id" : ObjectId( "5c50782193f833234ba90d55" ),
      "angle" : Decimal128( "1.6301023541559787031443874490659" )
   }
)

The following aggregation operation uses the $tanh expression to calculate the hyperbolic tangent of angle and adds it to the input document using the $addFields pipeline stage:

db.trigonometry.aggregate( [
   {
      $addFields : {
         "tanh_output" : { $tanh : "$angle" }
      }
   }
] )

出力例:

{
   "_id" : ObjectId("5c50782193f833234ba90d55"),
   "angle" : Decimal128("1.6301023541559787031443874490659"),
   "tanh_output" : Decimal128("0.9260761562750713360156803177935379")
}

Because angle is stored as a 128-bit decimal, the $tanh output is also a 128-bit decimal.

戻る

$tan

$toArray

$tanh（式演算子）

動作

null、NaN 、+/- Infinity

例

`null`、`NaN` 、`+/- Infinity`