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。
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
。
相關用法
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。