python 中的 numpy.cbrt()
哎哎哎:# t0]https://www . geeksforgeeks . org/num py-cbrt-python/
这个数学函数帮助用户计算 x 的立方根，所有 x 都是数组元素。 语法:
numpy.cbrt(arr, out = None, ufunc ‘cbrt’) :
参数:
arr : *[array_like]* Input array or object
whose elements, we need to square.
返回:
An array with cube root of x for all x i.e. array elements
代码#1:工作
# Python program explaining
# cbrt () function
import numpy as np
arr1 = [1, 27000, 64, -1000]
print ("cbrt Value of arr1 : \n", np.cbrt(arr1))
arr2 = [1024 ,-128]
print ("\ncbrt Value of arr2 : ", np.cbrt(arr2))
输出:
cbrt Value of arr1 :
[ 1\. 30\. 4\. -10.]
cbrt Value of arr2 : [ 10.0793684 -5.0396842]
代码#2:处理复数
# Python program explaining
# cbrt () function
import numpy as np
a = 4 + 3j
print("cbrt(4 + 3j) : ", np.cbrt(a))
b = 16 + 13j
print("\ncbrt value(16 + 13j) : ", np.cbrt(b))
输出:
<font color="red">TypeError:</font> ufunc 'cbrt' not supported for the input types,
and the inputs could not be safely coerced to any supported
types according to the casting rule ''safe''
代码#3:图形表示
# Python program explaining
# cbrt () function
import numpy as np
import matplotlib.pyplot as plt
a = np.linspace(start = -5, stop = 150,
num = 10, endpoint = True)
print("Graphical Representation : \n", np.cbrt(a))
plt.title("blue : with cbrt\nred : without cbrt")
plt.plot(a, np.cbrt(a))
plt.scatter(a, a, color = 'red')
plt.show()
输出:
Graphical Representation :
[-1.70997595 2.30347441 3.08793243 3.60027433 3.99768384 4.3287262
4.61565763 4.87076238 5.10162421 5.31329285]
参考文献: https://docs . scipy . org/doc/numpy-1 . 12 . 0/reference/generated/numpy . cbrt . html 。
