math.atan2

Python math.atan2()方法 (Python math.atan2() method)

math.atan2() method is a library method of math module, it is used to get the arc tangent value of "y/x" (i.e. atan(y/x)), it accepts two numbers and returns arc tangent of "y/x".

math.atan2()方法是數(shù)學(xué)模塊的庫方法，用于獲取“ y / x”的 反正切值(即atan(y / x) )，它接受兩個數(shù)字并返回“ y”的反正切/ x” 。

Note: math.atan2() method accepts the only number, if we provide anything else except the number, it returns error TypeError - "TypeError: a float is required".

注意： math.atan2()方法接受唯一的數(shù)字，如果我們提供除數(shù)字以外的其他任何內(nèi)容，它將返回錯誤TypeError- “ TypeError：需要浮點(diǎn)數(shù)” 。

Syntax of math.atan2() method:

math.atan2()方法的語法：

math.atan2(y, x)

Parameter(s): y, x – are the numbers whose arc tangent to be calculate (i.e. atan(y/x)).

參數(shù)： y，x –是要計算其反正切值的數(shù)字(即atan(y / x) )。

Return value: float – it returns a float value that is the arc tangent value of the numbers y/x.

返回值： float-返回一個浮點(diǎn)值，該值是數(shù)字y / x的反正切值。

Example:

例：

Input:y = 0.2345x = 1.234# function callprint(math.atan2(y, x))Output:0.18779323183177443

Python代碼演示math.atan2()方法的示例 (Python code to demonstrate example of math.atan2() method)

# python code to demonstrate example of # math.atan2() method # importing math module import math# numbers x = -1 y = 1 print("atan2(",x,",",y,") is = ", math.atan2(x,y))x = 0.2345 y = 1.234 print("atan2(",x,",",y,") is = ", math.atan2(x,y))x = -5 y = 5 print("atan2(",x,",",y,") is = ", math.atan2(x,y))x = 10 y = 20.23 print("atan2(",x,",",y,") is = ", math.atan2(x,y))

Output

輸出量

atan2( -1 , 1 ) is = -0.7853981633974483 atan2( 0.2345 , 1.234 ) is = 0.18779323183177443 atan2( -5 , 5 ) is = -0.7853981633974483 atan2( 10 , 20.23 ) is = 0.45908957477179374

TypeError example

TypeError示例

# python code to demonstrate example of # math.atan2() method with an exception# importing math module import math# numbers x = "2" y = "34" print("atan2(",x,",",y,") is = ", math.atan2(x,y))

Output

輸出量

Traceback (most recent call last):File "/home/main.py", line 10, in <module>print("atan2(",x,",",y,") is = ", math.atan2(x,y)) TypeError: a float is required

翻譯自: https://www.includehelp.com/python/math-atan2-method-with-example.aspx

math.atan2

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