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Python numpy.absolute()用法及代碼示例


numpy.absolute(arr,out = None,ufunc'absolute'):該數學函數可幫助用戶計算每個元素的絕對值。對於複數輸入a + ib,絕對值為 \sqrt { a^2 + b^2 }

參數:

arr  : [array_like] Input array or object whose elements, we need to test.

返回:


An array with absolute value of each array.  


代碼1:工作

# Python program explaining 
# absolute () function 
  
import numpy as np 
  
arr1 = [1, -3, 15, -466] 
print ("Absolute Value of arr1 : \n", 
                    np.absolute(arr1)) 
  
arr2 = [23 , -56] 
print ("\nAbsolute Value of arr2 : \n", 
                        np.absolute(arr2))

輸出:

Absolute Value of arr1 : 
 [  1   3  15 466]

Absolute Value of arr2 : 
 [23 56]


代碼2:使用複數

# Python program explaining 
# absolute () function 
  
import numpy as np 
  
a = 4 + 3j
print("Absolute(4 + 3j) : ", 
             np.absolute(a)) 
  
b = 16 + 13j
print("\nAbsolute value(16 + 13j) : ", 
                        np.absolute(b))

輸出:

Absolute(4 + 3j) :  5.0

Absolute value(16 + 13j) :  20.6155281281


代碼3:numpy.absolute()的圖形表示

# Python program explaining 
# absolute () function 
  
import numpy as np 
import matplotlib.pyplot as plt 
  
a = np.linspace(start = -5, stop = 5, 
                num = 6, endpoint = True) 
                  
print("Graphical Representation : \n", 
                        np.absolute(a)) 
  
plt.title("blue : with absolute\nred : without absolute") 
plt.plot(a, np.absolute(a)) 
  
plt.plot(a, a, color = 'red') 
plt.show()

輸出:

Graphical Representation : 
 [ 5.  3.  1.  1.  3.  5.]


參考文獻:
https://docs.scipy.org/doc/numpy-1.13.0/reference/generated/numpy.absolute.html



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注:本文由純淨天空篩選整理自Mohit Gupta_OMG 大神的英文原創作品 numpy.absolute() in Python。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。